* New "X" button appears in the system bar, allowing the
user to clear all notifications. Only appears when the
notifications list is showing and there are clearable
items. (Note: the textual button on phones has also been
replaced with an X.)
* Updated panel background artwork and positioning.
* Removed a bunch of old art.
Bug: 4970588
Bug: 4974043
Bug: 3509407 (regression)
Change-Id: Ibadb638cd18c4faa751cd1f311d73ceda65cb3ca
