At last! Implemented normal task EXT-3477 (Change gesture list implementation).

Created a new widget consisting of button and scrollist. List is added to NonSideTrayView
to properly draw it without using topcontrol (because it caused problems).

This commit also fixes following bugs:

EXT-3301 (Opening Gestures on Bottom Tray Disables Move Button)
EXT-3190 (No bottom tray's context menu appears if right mouse click was perform over enabled Gesture button)
EXT-2610 ('Gesture' btn: floater opens on OnMouseDown)

--HG--
branch : product-engine