SH-1747 mesh-asset-dep -- uploaded objects have bad permissions, and SH-1975 Name of mesh is not loaded into mesh uploader floater.  Also removed a lot of dead mesh uploader code.

Reviewed by Nyx.

Reformatted line showing prim equiv values, formatted to an integer,
removed old Render Cost display, and updated label of new display.

merged from
https://bitbucket.org/stone_linden/viewer-development-storm-1368

roxie_linden/viewer-developement

Merged in:
alain_linden/viewer-development
lindenlab/viewer-development

SH-1169 Fix for convex decompositions not working post mesh-asset-deprecation work. (also default SLM usage to on)