00eb42b88a
Fixed issue #26: Crash attempting to place wall with a stone block. Breaking (in creative) can now be undone as well. Undo/redo now tries to replace the previous blocks, if you have those blocks in your inventory (issue #33). Fixed undo in survival only undoing blocks that can be broken by hand (issue #29). Fixed being able to place randomizer bag inside itself (and prevented a black hole from creating) (issue #31). Randomizer bags can now be placed inside randomizer bags. Fixed crash when placing with empty randomizer bag (issue #32). Fixed diagonal wall and slope being 2 blocks thick.