Tangerine on Android APK ignore requestFullscreen()

[chrisekelley]

Current version: 3.26.2

Issue on tablet

Expected behavior

When user clicks the fullscreen button, the tangy-form element should become fullscreen. The top menu bar should disappear.

Actual behavior

Initially this fails. When user switches context to the tasks and then returns, the form becomes fullscreen.

[chrisekelley]

The solution uses some of the kioskMode functionality to force the header to disappear.

Also adds a listener for exiting kioskMode. User must click near the top of the screen 5 times in under 2 seconds. The exitClicks app-config.json property may be set to customize this value.