Nif loader: workaround for missed textures in BB/BH

Works for Better Bodies / Better Heads addons.
Use the correct GMST for the race menu
Convert the 0-1 glossiness parameter to 0-255 for shininess
Merge remote-tracking branch 'zini/master' into misc-cleanup
Don't create meshes for collision shapes
Set the race selection character preview in a valid (idle) pose.
Fix encumbrance term calculation
Z-up conversion: terrain, objects
Z-up conversion: camera
Z-up conversion: water, sky
Unrelated change: we always want the XAutoRepeat workaround, regardless of using exclusive input or not
Z-up conversion: local map, fix tcg
Z-up conversion: global map, shader fix
Local map: restore zHigh
Removing some leftovers of mwRoot node
Z-up conversion: raycasts
Z-up conversion: fix player arrow direction on global map
Merge remote-tracking branch 'scrawl/z-up'
Close messages boxes with the activation key (Bug #589)
Added click sound to OK button for message boxes