don't just crash when map IDs are missing

spit out a warning
convert tile ID 0 for RAED compatibility
Merge pull request #4566 from Mailaender/raed-tile0

Added RAED tile ID 0 support
Added debug cheat button to grow map resources.
Merge branch 'bleed' of https://github.com/OpenRA/OpenRA into GrowResources
Recovered lost changes.
Recovered changes.