It's a mess! There are more easy and better ways than a new packet for every different button. Kind of a lot of work, this messy GUI system is present in all GUIs.

I consider this done now. The remaining GUI-related packets are:

SetFilterOption - too custom for generic packets since two values are sent

InsertDirection - does byte operations on sent/received values so for sanity it should stay in it's own packet so the operations stay close together

9b722ba bbf8b2f 8307b36 41df6ef 53fb5a4 5a58b68 5e2135c 1ddd40c 32b751a f0672dc 8850614 d46af3d 9a1653f

have all done some more work on this.

532c098 Has fixed a good part of the GUIs, the Block Extender GUIs are a little more complicated and need more work.