Fixed incompatiblity with older saves
Renamed track files to reflect they are shared

and have been for a while - oops.
Tracklist automatically unslides when generating

If this gets annoying I can make an option to disable it
Check for permissions to modify tracks/nodes
Right click in settings tab to set the color of entire track
Fixed infinitely-building coaster

I think?
As models are split, the unfinished meshes are drawn

I'll make this an option, but with the latest modification to how tracks
are built it makes this super easy!!
New/renamed convars, some cleaning up

A: coaster_physmesh_resolution (1-1000)
A: coaster_mesh_maxvertices
A: coaster_mesh_drawoutdatedmesh
A: coaster_mesh_drawunfinishedmesh
M: coaster_previews -> coaster_mesh_previews
M: coaster_autobuild -> coaster_mesh_autobuild
M: coaster_resolution -> coaster_mesh_resolution
M: coaster_stepspercycle -> coaster_mesh_stepspercycle

I also did a bit or rearranging to clean stuff up
Added some settings to top menu bar

some, other things require more than just on/off