Tails Flight Indicator Bruh Moment

Closes #331, #330, and #309

See merge request STJr/SRB2Internal!517

It's not safe to store a file-scope pointer to a mobj_t* without having any mechanism to clear it between map reloadings, so move the Tailsbot "press jump now to fly!" indicator into `tails->target`.

Resolves #331, and likely also #330 and #309.

Fix crossfades

See merge request STJr/SRB2Internal!514

drt minus

See merge request STJr/SRB2Internal!495

Fix missing MMX check

See merge request STJr/SRB2Internal!513

Fixes NoReload using the wrong wipestyle.
Also fixes non-titlemap title screen wipes using the wrong wipestyle.

VAdaPEGA's GFZ debris

See merge request STJr/SRB2Internal!505

MS Info packet tweaks (resolves #300)

Closes #300

See merge request STJr/SRB2Internal!499

Sea Egg targeting systems online! (resolves #303)

Closes #303

See merge request STJr/SRB2Internal!501

Add fun™ to rollout rocks

See merge request STJr/SRB2Internal!504

Fix conditionset-based unlocks on the Sound Test (resolves #312).

Closes #312

See merge request STJr/SRB2Internal!508

Intermission fixes/cleanup

See merge request STJr/SRB2Internal!509

Followmobj Record Attack fix (resolves #322).

Closes #322

See merge request STJr/SRB2Internal!510

Players All reliability fix (resolves #301 and #315)

Closes #301 and #315

See merge request STJr/SRB2Internal!500

(Cleanup) Remove unused levelwipes

See merge request STJr/SRB2Internal!507

Remove D_ProcessEvents call in G_PreLevelTitleCard (resolves #317)

Closes #317

See merge request STJr/SRB2Internal!506

Move all the visitation/emblems/record attack update stuff into a single function, and call that function in two different places depending on whether the tally screen is visited or not.

Requires deleting all of RC1's Record Attack replays with followmobj characters, but I think you'll agree that's a reasonable price to pay.

* Move the visitation flags, Record Attack/NiGHTS Attack data, and emblem checking to outside of Y_StartIntermission.
* Y_CleanupScreenBuffer never got called for maps which skip the intermission, leading to a small memory leak; this is now fixed by moving it to G_AfterIntermission.
* Y_FollowIntermission was just G_AfterIntermission with modeattacking specific behaviour, but this is desired for all places where G_AfterIntermission is called, so just merge this into G_AfterIntermission.

Notably, these changes are necessary because there are now three maps in the main SP campaign which do not end with traditional intermissions. As a result, this fixes an issue where Black Core's tracks are not available in the Sound Test (due to MV_BEATEN never being applied).

Also, since I was here: Remove "gotperfect" from recorddata_t. This is a duplicate of `mapvisited[gamemap-1] & MV_PERFECT` which uses more memory. I have kept the new spacing in the gamedata for compatibility with RC1 savedatas, but moved it across to the original method everywhere else.

Prevent gametype changes being out of range

See merge request STJr/SRB2Internal!503

Fix issue with strcasestr that causes a map command crash

See merge request STJr/SRB2Internal!502

Subtitle subterfuge (resolves #306)

Closes #306

See merge request STJr/SRB2Internal!498

Fix crash in new fireflower (resolves #305).

Closes #305

See merge request STJr/SRB2Internal!497