Moving the QSB to the workspace grid.

The QSB will only be resent on the first screen of the workspace
covering the full width of the first row. If will not be movable.
The first screen of the workspace will not be movable.
The searchDropTargetBar no longer contains the QSB (it can be
renamed in aseparate cl).

Refactoring all QSB related logic by moving it to a custom view
inflated only using xml.
Change-Id: Icb4fd6eb855df1af15f685961c38351bf4fd4f4a