MAINT-6257 Textures loading issues.

indra/llui/lliconctrl.cpp

indra/llui/lliconctrl.h

indra/newview/llavatariconctrl.cpp

indra/newview/llgroupiconctrl.cpp

indra/newview/llgroupiconctrl.h

indra/newview/llgrouplist.cpp

indra/newview/llgrouplist.h

indra/newview/lllocalbitmaps.cpp

indra/newview/llpanelface.cpp

indra/newview/lltexturectrl.cpp

indra/newview/lltexturefetch.cpp

indra/newview/lltoastgroupnotifypanel.cpp

indra/newview/llviewertexture.cpp

indra/newview/llviewertexturelist.cpp

indra/newview/llviewertexturelist.h

indra/newview/llvoavatar.cpp

indra/newview/skins/default/xui/en/panel_group_list_item.xml

indra/newview/skins/default/xui/en/panel_group_notify.xml