Changed some tiles types
Added some trait [Desc()]s.
Merge pull request #5946 from Phrohdoh/MoreTraitDocs

Added some trait [Desc()]s.
Merge pull request #5932 from MustaphaTR/d2k-only-inf-fix

D2K - Fixed some tiles should be only infantry
Hijacker again buildable by soviets
Merge pull request #5954 from abcdefg30/fixhijacker

Made Hijacker buildable by soviets
Fix mouse event filtering in BackgroundWidget.
Allow ImageWidget to filter mouse events.
Fix mouseover filtering in cloned widgets.
Move TD production widgets into the RA project.
Don’t crash if there are no production icons. Fixes #5543.
Extract ProductionPalette background drawing into logic code.
Add support for single-line time display.
Extract sidebar logic into smaller classes.
Add new RA UI.