Resizing "Enable preview mode" pictures in getting started (microsoft#311)

Author: vandyliu

src/view/pages/__snapshots__/gettingStarted.spec.tsx.snap

@@ -222,6 +222,12 @@ exports[`GettingStartedPage component  should render correctly 1`] = `
     <img
       alt="Open settings"
       src="https://raw.githubusercontent.com/microsoft/vscode-python-devicesimulator/dev/assets/readmeFiles/clue/open_settings.PNG"
+      style={
+        Object {
+          "height": "337px",
+          "width": "346px",
+        }
+      }
     />
     <ul>
       <li>
@@ -264,6 +270,12 @@ exports[`GettingStartedPage component  should render correctly 1`] = `
     <img
       alt="Enable preview mode"
       src="https://raw.githubusercontent.com/microsoft/vscode-python-devicesimulator/dev/assets/readmeFiles/clue/check_preview_mode.gif"
+      style={
+        Object {
+          "height": "157px",
+          "width": "333px",
+        }
+      }
     />
     <h3>
       1. Import the the main CLUE library (This is required)

src/view/pages/gettingStarted.tsx

@@ -138,13 +138,13 @@ export class GettingStartedPage extends React.Component {
                         <h2> Tutorial for CLUE </h2>
                         <h3> 0. Enable Preview Mode to use the CLUE (This is required)</h3>
                         <p> a. Access your settings:</p>
-                        <img alt='Open settings' src='https://raw.githubusercontent.com/microsoft/vscode-python-devicesimulator/dev/assets/readmeFiles/clue/open_settings.PNG'></img>
+                        <img alt='Open settings' src='https://raw.githubusercontent.com/microsoft/vscode-python-devicesimulator/dev/assets/readmeFiles/clue/open_settings.PNG' style={{width: '346px', height:'337px'}}></img>
                         <ul>
                             <li>Windows or Linux: press <kbd>Ctrl</kbd> + <kbd>,</kbd> or go to <code>File -> Preferences -> Settings</code></li>
                             <li>Mac: press <kbd>Cmd</kbd> + <kbd>,</kbd> or go to <code>Code -> Preferences -> Settings</code>.</li>
                         </ul>
                         <p> b. Check the <code>"Device Simulator Express: Preview Mode"</code> setting.</p>
-                        <img alt='Enable preview mode' src='https://raw.githubusercontent.com/microsoft/vscode-python-devicesimulator/dev/assets/readmeFiles/clue/check_preview_mode.gif'></img>
+                        <img alt='Enable preview mode' src='https://raw.githubusercontent.com/microsoft/vscode-python-devicesimulator/dev/assets/readmeFiles/clue/check_preview_mode.gif' style={{width: '333px', height:'157px'}}></img>
                         <h3>
                             1. Import the the main CLUE library (This is
                             required)