hotfix broken mods folder
Merge pull request #4117 from Mailaender/nsis-mods-hotfix

Install mods to OpenRA\mods sub-folder using NSIS!
Fix FlashTarget crash
Merge pull request #4126 from ScottNZ/flashtarget-crash

Fix FlashTarget crash
Fix debian package and packaging.
Merge pull request #4128 from pchote/deb-fix

Fix debian package and packaging.