Port nod01 to New Lua
Fix end game window conflicting with ingame menu

Fixes #6311
Port gdi04c to New Lua
unit -> units to avoid crashes
added ftur and removed hbox
removed unused buildable: owner: ...
moved mediamessage to avoid spam
fix production queues and prerequisites
Readd correct buildingspeed modifier
Fix D2k infantry death sequences.
Fix wrong sequence lengths
inform players about nickname changes in the lobby
self-document and un-hardcode the prone sequence prefix
remove unused duplicate stand sequences
remove bogus tab
fix infantry without idle anim staying in fire animation state

closes #5884
add missing TakeCover trait
replace bogus tab with space
Merge pull request #6319 from abcdefg30/fortlonestar

Small cleanup on fort-lonestar map
Merge pull request #6369 from Mailaender/nickname-change-message

Added a server message about nickname changes