Only show level select option if started a session from a level select

See merge request STJr/SRB2!2611

Fix single player level select conditions (resolves #1385)

Closes #1385

See merge request STJr/SRB2!2609

Make chat aware of team colors on normal chat plus custom team colors

See merge request STJr/SRB2!2588

Remove redundant P_CyclePlayerMobjState function

See merge request !2601

Make v.getSprite2Patch able to fallback to non-super sprites

See merge request !2597

Merge branch '1378-2-2-14-character-continue-icon-xtrac0-doesn-t-properly-show-for-all-characters-both-vanilla' into 'next'

Fix #1378

Closes #1378

See merge request !2599

Fix team scoreboards: The sequel

See merge request STJr/SRB2!2598

Fix file downloader checking the old asset file names

See merge request STJr/SRB2!2596

Fix freeslots + add DeltaSanic to the credits

See merge request STJr/SRB2!2592

Fix pipeline broken on clang

See merge request !2593

This reverts commit 1bb51b0e.

This reverts commit 64aefe73.

Fix #1342

Closes #1342

See merge request STJr/SRB2!2587

This reverts merge request !2585

Fix slope contrast

See merge request STJr/SRB2!2585

Further improve sleep accuracy on UNIX systems

Closes #1210

See merge request !2583