Possible fix for inescapable crafting loops

is_abortable() was missing ACT_CRAFT, but had ACT_LONGCRAFT, which may fix the issue that user cSep was having in regards to issues 'cancelling crafting until done' on normal recipes.

I also expanded the enumeration in player_activity.h to be a bit more clean, and added a newline at the end of game.cpp (was crashing a vim plugin of mine, and I know that most gnu compilers bark about this stuff as well).

Cheers!

fixes #7110