Add a quick SELinux mode toggle

There's no way to make it persistent, by design. This is purposefully
undocumented and meant to test policies at this stage.

Change-Id: Ic79ed773b199b68fee15f94acd2107a5ad20dc25
Fix app selection when adding apps to app groups.

- Don't drop separate apps with the same title
- Sort case-insensitive
- Sort disabled apps to the end of the list

Change-Id: Iffadca4896468aaee5fcfd60f8776c2bb1a8ce7f