docs(navigation): Updates images for v6.

packages/documentation-site/patternfly-docs/content/design-guidelines/components/navigation/navigation.md

@@ -4,9 +4,13 @@ section: components
 related: ['Page', 'Breadcrumb', 'Tabs']
 ---
 
+import '../components.css';
+
 ## Elements
 
-<img src="./img/nav-elements.png" alt="Examples of different navigations offered by PatternFly" width="990"/>
+<div class="ws-docs-content-img">
+![Elements of the different navigations offered by PatternFly.](./img/nav-elements.svg)
+</div>
 
 1. **Masthead**
 2. [**Horizontal navigation**](#horizontal-navigation)
@@ -33,8 +37,6 @@ There are two main variations of the navigation component each of which contain
 
 ### Vertical navigation 
 
-<img src="./img/single-level.png" alt="Example of simple vertical navigation" width="634"/>
-
 Vertical navigation is hierarchical global navigation that displays navigation options from top to bottom on the left side of a screen. PatternFly vertical navigation can be collapsed to provide additional screen real estate by using a menu icon button at the top left.
 
 #### When to use
@@ -48,31 +50,41 @@ Patternfly vertical navigation system includes several variants as described bel
 
 When you only have one level of navigation to display, use a simple, single-level vertical navigation.
 
-<img src="./img/single-level.png" alt="Example of simple vertical navigation" width="634"/>
+<div class="ws-docs-content-img">
+![Example of simple vertical navigation.](./img/nav-vertical-simple.svg)
+</div>
 
 ### Grouped navigation
 
 When you have a small amount of secondary navigation items, you can group your items and display them persistently beneath the primary navigation items.
 
-<img src="./img/two-level.png" alt="Example of grouped vertical navigation" width="634"/>
+<div class="ws-docs-content-img">
+![Example of grouped vertical navigation.](./img/nav-vertical-grouped.svg)
+</div>
 
 ### Expandable two-level navigation
 
 When you have a large number of secondary navigation items, you can use an expandable navigation to collapse and expand options as needed.
 
-<img src="./img/expandable-nav.png" alt="Example of expandable vertical navigation" width="634"/>
+<div class="ws-docs-content-img">
+![Example of expandable vertical navigation.](./img/nav-vertical-expand1.svg)
+</div>
 
 ### Expandable three-level navigation
 
 When you have three levels of navigation items, you can use a three-level expandable navigation to expose tertiary navigation items. Expansion works well when there are small numbers of items at the current level and the entire page hierarchy can be visualized at the same time.
 
-<img src="./img/expandable-nav-tertiary.png" alt="Example of expandable tertiary vertical navigation" width="634"/>
+<div class="ws-docs-content-img">
+![Example of expandable tertiary vertical navigation.](./img/nav-vertical-expand2.svg)
+</div>
 
 ### Fly-out navigation
 
 Fly-out navigation exposes navigation items nested within a parent node in an overlay panel that appears to the right of the parent item on hover or click. Fly-out menus can be used to expose secondary or tertiary levels of navigation. While fly-out menus can be cascaded to display two or more levels of hierarchy below the parent page, this is not recommended as the mouse interaction required to navigate a multi-tiered flyout menu can be difficult for some users.
 
-<img src="./img/fly-out.png" alt="Example of fly-out navigation" width="917"/>
+<div class="ws-docs-content-img">
+![Example of vertical navigation with a fly-out.](./img/nav-vertical-flyout.svg)
+</div>
 
 The advantage of fly-out menus is that they allow a user to easily scan through secondary menu items. When using fly-out menus, keep in mind that the page in view may not be exposed as a selected menu item at the top level. Therefore, when using fly-outs, we strongly recommend use of [breadcrumbs](/components/breadcrumb) to help users understand where they are currently working within the site hierarchy.
 
@@ -82,7 +94,9 @@ Also, consider how likely it is that your application will be used on a mobile p
 
 Drill-down menus replace the current navigation menu with the next set of child items in the page hierarchy when the user clicks on a parent item to drill down. A back link is provided at the top of the menu to return to the parent level.
 
-<img src="./img/drill-down.png" alt="Example of drill-down navigation" width="916"/>
+<div class="ws-docs-content-img">
+![Example of drill-down navigation.](./img/nav-vertical-drilldown.svg)
+</div>
 
 Using drill-down navigation, only the navigation items for the current page and its siblings will be visible at any given time. This pattern is very mobile-friendly as it minimizes the need for scrolling to see the entire menu. However, it should be avoided if you expect users to frequently move between levels.
 
@@ -101,24 +115,32 @@ Here are some examples of hybrid navigation patterns that you may find useful.
 #### Fly-outs with tertiary drill-down
 By using fly-outs to expose secondary navigation items and then drilling into third level items, you can keep the current page and its siblings visible as the user works. This is a good pattern to use when you expect users to spend most of their time working within the same section of the application.
 
-<img src="./img/flyout-to-drill-down.png" alt="Example of composable navigation with fly-out and drill-down menus" width="1143"/>
+<div class="ws-docs-content-img">
+![Example of vertical navigation with fly-out and drill-down menus.](./img/nav-vertical-drilldown-flyout.svg)
+</div>
 
 #### Two-level expansion with drill-downs
 You can use expanded menus to expose the first two or three levels of page hierarchy and then drill-down to the lowest level. This pattern is preferred to using fly-outs with a drill-down when there are fewer secondary level items and/or you require a mobile friendly solution.
 
-<img src="./img/expansion-to-drill-down.png" alt="Example of composable navigation with expansion and drill-down menus" width="928"/>
+<div class="ws-docs-content-img">
+![Example of vertical navigation with expansion and drill-down menus.](./img/nav-vertical-expansion-drilldown.svg)
+</div>
 
 #### Drill-down with tertiary expansion
 
 Consider using a drill-down menu at the primary level and expansion to expose levels two and three when you want to make it easy for users to move between items at levels two and three without the need to frequently move back to the primary level to explore other branches.
 
-<img src="./img/drill-down-to-expansion.png" alt="Example of composable navigation with drill-down and expansion menus" width="916"/>
+<div class="ws-docs-content-img">
+![Example of vertical navigation with drill-downs and tertiary expansion.](./img/nav-vertical-drilldown-tertiary-expansion.svg)
+</div>
 
 ### Horizontal navigation 
 
 Horizontal navigation is global navigation that displays navigation items from left to right in the application's masthead.
 
-<img src="./img/horizontal-nav.png" alt="Example of horizontal navigation" width="990"/>
+<div class="ws-docs-content-img">
+![Example of horizontal navigation.](./img/nav-horizontal.svg)
+</div>
 
 #### When to use
 * You have less than 5 primary navigation items
@@ -128,17 +150,20 @@ Horizontal navigation is global navigation that displays navigation items from l
 
 Use secondary horizontal navigation when you want to provide more granular navigation specific to a particular page or window in your application. This differs from [tabs](/components/tabs), since tabs would allow you to switch perspective on the same page, while each secondary horizontal navigation item would be sending you to a distinct URL. For example, a user might use global navigation to get to a settings page, and then use local navigation to access privacy and general user settings.
 
-Secondary horizontal navigation can be paired with vertical or horizontal navigation. It provides deeper nesting to the vertical navigation, which may help prevent the navigation from becoming too long.
-
-<img src="./img/secondary-horizontal-nav.png" alt="Example of secondary horizontal navigation" width="880"/>
+Secondary horizontal navigation can be paired with vertical or horizontal navigation. It provides deeper nesting to the vertical navigation, which may help prevent the navigation from becoming too long. The title of the page should reflect the selected horizontal navigation item. You can provide further nested information by using tabs.
 
-**Selected nav item:** The title of the page should reflect the selected horizontal navigation item. You can provide further nested information by using tabs.
+<div class="ws-docs-content-img">
+![Example of secondary horizontal navigation.](./img/nav-secondary-vertical.svg)
+</div>
 
-We recommend either using horizontal navigation OR vertical navigation as your primary. The secondary horizontal navigation can be added to either and contains similar styling to the primary navigation either way.
+<div class="ws-docs-content-img">
+![Example of horizontal primary and secondary navigation.](./img/nav-secondary-horizontal.svg)
+</div>
 
-<img src="./img/horizontal-primary.png" alt="Example of secondary horizontal navigation as primary navigation" width="880"/>
 
 Secondary horizontal navigation follows a similar responsive design as our other horizontal navigation types.
 Overflow items can be navigated to by using horizontal scroll or the arrows.
 
-<img src="./img/sec-nav-mobile.png" alt="Example of secondary navigation mobile responsiveness" width="320"/>
+<div class="ws-docs-content-img">
+![Example of horizontal navigation on a mobile screen.](./img/nav-mobile.svg)
+</div>