[feature-request] Add cutom appBar, bottomNavigationBar and floatingActionButtonLocation

[TheOneWithTheBraid]

n many cases, it's required not to have the FAB on top on desktops as well as having a fully customized app bar and a bottomNavigationBar. That's why I suggest the following changes:

final Widget appBar;
final ResponsiveFloatingActionButtonLocation floatingActionButtomLocation;
final Widget bottomNavigationBar;

/// somehow implement `drawerDocked` or if possible simply extend the existing FloatingActionButtonLocation enum
enum ResponsiveFloatingActionButtonLocation {
    drawerDocked,
    ...
}


/// within the build() method you could remove the appBarButton from the drawer if needed by
Widget build() {
    widget.appBar.leading = null;
    widget.automaticallyImplyLeading = false;
}

[TheOneWithTheBraid]

Is there anyone working on or are there any other ideas on?