message: docs(app): note features of ion-app
diff: @@ -31,6 +31,14 @@ import EncapsulationPill from '@components/page/api/EncapsulationPill';
  App is a container element for an Ionic application. There should only be one `<ion-app>` element per project. An app can have many Ionic components including menus, headers, content, and footers. The overlay components get appended to the `<ion-app>` when they are presented.
  +Using `ion-app` enables the following behaviors:
  +
  +* [Keyboard Lifecycle Events](../developing/keyboard#keyboard-lifecycle-events) without the need for any native plugins
  +* [Hardware Back Button Listeners](../developing/hardware-back-button) for customizing the hardware back button behavior on Android devices
  +* Status bar support in Capacitor or Cordova which allows users to scroll to the top of the view by tapping the status bar
  +* Scroll assist utilities which scroll the content so focused text inputs are not covered by the on-screen keyboard
  +* [Ripple effect](./ripple-effect) when activating buttons on Material Design mode
  +* Other tap and focus utilities which make the experience of using an Ionic app feel more native
  ## Properties
  