App sidebar: some adjustments

- Cleanup
- fix disappearing appbar on changing appbar position
- may fix endless FC on changing appbar contents

credit to lion0738
fix part of keyguard system ui fc
[1/4] Base: Smart Phone Call
Allow disabling of FC dialogs (1/2)
Revert "SystemUI: open settings panel if there are no notifications"

This reverts commit 12c17098ad2ea497148e9a94235e68333c387462.
derp
Merge github.com:ResurrectionRemix/android_frameworks_base into kitkat1
Merge remote-tracking branch 'rr/kitkat1' into kitkat1