fix cnc menu/multiplayer titles overrides by server's title;
spelling fix
add tab cycle key to setting GUI
fixes #2791 don't crash on powerdown hotkey when playing cnc
pull cnc sell/repair button hotkeys from settings
fixes #2785 don't crash when last player leaves game in cnc
fixes #2799: double click on server to join
Merge pull request #2809 from bidifx/dblclick

double click on server to join
radoc tidy
Merge pull request #2816 from ScottNZ/radoc

radoc tidy
Desura compatibility

- create launch scripts for Desura
- that access local installation launch scripts
- clean up /usr/* launch scripts created during make install
recommend Cg-Toolkit as soft dependency for Fedora/SUSE

it is in the non-free / RPMfusion repositories
bring the Diplomacy menu back to life, but

- rename LockTeams to FragileAlliances to avoid confusion
- only allow it in Free-For-All, not Team games or Missions
- grey out non-functional buttons and disabled checkboxes
dump the actor the unit tried to retiliate against to syncreport
sync carpet bombing
put NextAutoTargetScanTime into syncreport.log
fixes #2190 added announcer voice upon game start

Thanks to @Nyerguds for mixing this together for the RA mod!
package .desktop files for map editor on Linux, too

move desura scripts into packaging sub-directory
remove bashisms for extended portability
move order button hotkey logic to ingame chrome logic

removes power-down again from cnc mod as it is not wanted there