From now on, calling start*Application will clear the activity stack and the new activity as
the root of an empty stack. This means we don't support "Modal" or opening screens in new activity.

Enabled resources (Toolbar icons) in release mode.

This bug caused app to start in white screen after it was relaunched since index file had already
run once.

Navigator.push allows us to open a new screen. Currently it starts a new Activity with the screen
as it’s root view, but this is only a temporary behaviour. The intended behaviour is similar to
View Controllers on iOS which allows you to manage view hierarchies or a stack of fragments
managed by FragmentManager on Android.