add the desync-debug traits to the actors of default mods
non-targetable trees, fixes #2875 and related regressions

makes them indestructable again except for super-weapons
add missing StartGame notification to cnc-classic

empty value, fixes a crash
Merge pull request #2878 from Mailaender/indestructable-trees

Non-targetable Trees
Merge pull request #2876 from Mailaender/debug-traits

add the desync-debug traits to the actors of default mods
Merge pull request #2881 from Mailaender/start-game-cnc-classic-hotfix

Hotfix: C&C classic don't crash on game start
closes #2874: improved ingame chat