fix the music list not being populated after CD asset install
remove non-existing "INIT_SETUP" chrome widget reference
rename gameinit to install for consistency
prevent flickering
consistent size for all install panels
Let FieldLoader do the hard work of loading fields.
fix Tiberian Sun installation from CD
@pchote breaks all the things
Reimplement Shadow toggle for Missile projectile.

Enable Shadow by default.
Removes Missile-shadow-related bitrot.
TS changes to improve missile test cases.
Merge pull request #5304 from Mailaender/music-downloads

Added Music downloads
Merge pull request #5828 from reaperrr/missile-shadow

Re-implement Shadow support for Missiles
split WithActiveAnimation from SeedsResource

closes #5300
don't play active animation when we sell it
Merge pull request #5806 from Mailaender/seeds-resources-cleanup

Fixed SeedsResources messing with make animation
depend on proper status in auto-downloading
Merge pull request #5839 from ihptru/downloadingstatus

depend on proper status in auto-downloading
add FrozenActorLayer to Tiberian Sun
add blossom trees to Tiberian Sun