fix up issue in model editor UV editor of multiple 'export UV map'
buttons being stacked
clean up number input being derpy with manual input, also fix crashing
on 'empty' input for a numberinput field
more cleanup of crashy/annoying things in model editor/gui framework
update flywheel model.  add uv map.
lots of cleanup to flywheel render, some minor updates to how torque
tiles handle block updates (enable generic block/metadata updates in
addition to purely tile-entity change updates)