What changed in EDuke32, build by build

Change "Size:" entries in HUD Setup to "Scale:" and indent them.

If you open the Help menu with the F1 key, make Help the selected item on the main menu, if applicable.

Factor out code into Menu_AboutToStartDisplaying and Menu_ChangingTo.

Use SMALLFNTCURSOR for a text caret in the absence of a SPINNINGNUKEICON tile.

Factor out SPINNINGNUKEICON drawing

Don't play EXITMENUSOUND when trying to close a root menu outside of an active game.

Fix RangeInt32.

Disable compilation of all code pertaining to MenuRangeDouble_t, since we're not using any.

Clean up MenuRanges.

Draw most text using YCenter and YOffsetZero modes to facilitate certain kinds of visual cues.

Use screentext's newline support for more mgametext.

Wrap Menu_Find in Menu_FindFiltered to factor out id filtering for all cases that need it.

Improve handling of the color correction screen.