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.

Basic workarounds for overlapping drawn map (rename buttons) and short team list (set a min height). Min size of form still fits targetted min size on desktop of 800x600

Add shoppamap lua as mikade requested. also add 50% chance of bottom border w/ holes as he requested. Also disable land objects in shoppa scheme, since that's more common way to play it.

I don't see how rating these against others is useful, given the limited radius, and the cluster bomb thing just seems counterproductive. Anyway, this prevents AI from picking on barrels.