Attempt to fix gray avatars on mobile networks.

Ported from
https://bitbucket.org/monty_linden/viewer-library-refresh/commits/e8798627919c0ef176be23bb3340d5da0810794c
Merge branch 'master' of git://github.com/AlericInglewood/SingularityViewer
Revert "[Preferences Refactor] Remove window size combo box from graphics preferences"

The issue wasn't the resolution box, and it apparently has its uses.
This reverts commit ac106b0aff3cb0c710b6473d7582e2d8f6b6def4.

Conflicts:
	indra/newview/skins/default/xui/en-us/panel_preferences_graphics1.xml