Add NavButtons LongPress Actions

Change-Id: I4d3a354329d1ec02db96a2b85c237c6735136400
Remove extra InputMethodButton/Panel in TabletUI

Change-Id: I15704abb008174cb35608d26df958ad4703ae769
Disable permanent "Choose Input Method" Notification

Change-Id: I27b69f133004a5f4f039b1f695d1eea09dfadf48
Fix wrong display state of Back /IME down Keyboard icons in NavBars

Change-Id: I3e4ee16249d0bb2d173a278d2031d22842831a89
 Change Right TouchPad/Mouse Button to send Back command

Change-Id: I27e9e4994ffc604ddf8027a51e528597a35b8ba7
Simplifies NavButtons LongPress Actions

Fixes long press actions not being activated the 1st time if it was set to no action before.

Change-Id: I885bc4f8c1336217d9cc26fcc1924491a5f3b801