WIP - multiSpotLightF uses proper PBR shading, alpha is broken but pushing now in case my hard drive melts

# Conflicts:
#	indra/newview/llpanelface.cpp
#	indra/newview/llpanelface.h

SL-18156 WIP -- Add NormalizedScale/NormalizedTranslation to mesh assets to recover mesh's original coordinate frame when generating tangents post download.

following promotion of DRTVWR-544

SL-18151 [SEC] MOAP can force multiple floaters open on users screen: The Viewer part of the fix for this JIRA - pulls in the updated Dullahan that exposes the user_gesture/is_redirect flags and uses them to determine what type of 'nav_type' is exchanged with viewer/plugin

Don't add popup to the list twice

SL-17701 WIP -- Correct color space management for base color and emissive color factors and textures.  Support for double sided alpha blended PBR materials.