Correctly handle click (with no drag) when resizing a window.

Currently if user moves the mouse to the window edge where
the pointer changes to a double arrow and then clicks (without
dragging) the freeform window will resize to fullscreen which is
strange.

Bug: 28318822
Change-Id: Ie47a80953dd91f998aa1c32662b363fe0a08fa90
1 file changed