SL-17670 Simplify outfit snapshot floater

indra/newview/CMakeLists.txt

indra/newview/llappviewer.cpp

indra/newview/llfloatersimpleoutfitsnapshot.cpp

indra/newview/llfloatersimpleoutfitsnapshot.h

indra/newview/llfloatersnapshot.cpp

indra/newview/llfloatersnapshot.h

indra/newview/lloutfitgallery.cpp

indra/newview/llsnapshotlivepreview.cpp

indra/newview/llsnapshotlivepreview.h

indra/newview/llviewerassetupload.cpp

indra/newview/llviewerfloaterreg.cpp

indra/newview/llviewermenufile.cpp

.../newview/skins/default/xui/en/floater_outfit_snapshot.xml

...w/skins/default/xui/en/floater_simple_outfit_snapshot.xml