[aquaria] [patch] Animation editor related

[False.Genesis]

Two things that annoyed me in the animation editor (bone jumping and a 
more-than-necessary clunky mouse control when dragging around bones). 
See patch/changes for details. I found the added text label helpful when 
finetuning angles/positions, so i left it in.

I wonder why the mouse is constrained to that rectangle, anyways. Might 
be easier to work with if that part of the code was just removed.
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