What changed in EDuke32, build by build

When RETURN is set to INT32_MIN in EVENT_CHANGEMENU, cancel any animations in addition to not changing the current menu.

Mostly revert r5326, and instead restrict the starting and stopping text input to touch devices where we need the on-screen keyboard to appear. This maintains the bugfix on targets with a physical keyboard.

Call SDL_Start/StopTextInput() at the appropriate times so that touch devices display the on-screen keyboard when the user is prompted for text input.

When toggling Music in the Sound menu, respect the LOGO_PLAYMUSIC flag in LOGO_FLAGS for the main menu.

Modify slider bar so that it uses a scale defined in the data structure instead of auto-scaling to the height of the row.

Remove all remaining TEXT_GAMETEXTNUMHACK.

Rename "pickup messages" to "game messages".

Add a Cheats menu to options.

Rename MenuPassword_t to MenuTextForm_t, modularize more of its attributes into the data structure, and polish its display and behavior.

Fix assorted issues in MENU_NETOPTIONS.

Mouse, touch, and pointer controls now take the origin into account.

Implement better back button.

Make black background boxes translucent again.

Add proper edging for the tops and bottoms of scrolling lists.

Disable the spinning nuke icon back button on Android.