New windows on GNOME with LIBDECOR windowing would sometimes have an
unusable title-bar with the whole title-bar acting as the edge-resize.
Would happen predictably when opening large windows which the window
manager would resize to fit the display.
The cause of this was Blender receiving a window configure event
without a window size for new windows. This configure event
would be ignored, causing the title bar not to work properly.
This is a regression from [0] which removed logic to calculate the
window size from the arguments passed to GHOST for window creation.
This wasn't correct either as the it could temporarily set the
window size before the requested size configuration was received.
Resolve the problem by queuing configuration requests,
handling them then the requested window size is known.
[0]: 1455315111
503de16353