Fix fields not being auto filled when reloading.

Fixed outer + and - buttons.

Fix inner + and - buttons.

Change category parameter naming to prevent naming conflicts.

Fix equations being reset when amount of stock changes
Broke +- buttons. Will fix soon.

Make thingdef searching consider the recipe's settings, such as HP, quality and tainted.

Fix some thingdef names not being searchable.

Document category and thingdef usage in game.

Add category searching.
Fix do until x resetting to a number.

Compile for 1.3 (easier than i thought)