Remove C4 demolishability from RA vehicles
Remove redundant tab
Fixes mines and explosion crates not damaging crusher/collector
Fix a loop closure bug in the weapons code.

Fixes #6597. Fixes #6599.
Minor style fixes.
Merge pull request #6606 from reaperrr/mine-investigation

Fixes mines doing no damage to crusher
Merge pull request #6607 from reaperrr/fix-vehicle-c4

Remove C4 demolishability from RA vehicles
Merge pull request #6612 from pchote/fix-warheads

Fix a loop closure bug in the weapons code.
build with latest Mono from @Xamarin
Merge pull request #6605 from Mailaender/travis-mono-latest

Build releases with latest Mono
Sound Fix for DropDownButton Widget