Likely happened because some textures had 0 height width initially, but
this is for UI/preview so request maximum either way.

scale thumbnail textures down to 256 when needed. As we do to chat icons.

# Conflicts:
#	indra/newview/llviewertexture.cpp

* SL-20570 Fix for lossy (and square) normal maps when importing GLTF materials.

* SL-20582 Fix for overriding to alpha mode blend not working.  Incidental decruft of dead code (thanks, Rye!)

also added suggested continue statements, and removed obsolete
LLInventoryItem::fromLLSD deserialization codepath.

Update editor in which texture changed to local

ensure inventory skeleton loading doesn't block the message system from processing packets.

SL-19979 Fix for frame stalls on mac with shadows enabled.  Also fix multihreaded GL not working on mac (thanks, Rye!)

SL-20397: Fix material set from script not updating when the GLTF material has non-default texture transforms

SL-20397: Fix material set from script not updating when the GLTF material has non-default texture transforms

SL-19979 Temporary hack "fix" for performance issues on Mac -- never implicitly enable reflection probes or shadows.

SL-20536: Fix build error C1128 on Windows RelWithDebInfo

following promotion of DRTVWR-578

SL-20065: Hack to reduce black spots on shiny water