Restore ready toggle for room admins (issue #432)

Needs to reset net button, not toggle it.

use less collision space for the holes

don't draw a border if there's already a bottom border, avoid placing objects over gaps in the floor

Package the 3 dynamic maps broken by recent uFloat changes as static maps. first_blood actually didn't seem to need it, but, just in case.

suggestion of unc0rr's to fix issue w/ random maps in campaign. load sidecar packages in physfs for lua. should be useful also for lua that does custom layouts

Change net button back on leaving main page.