Better GIH creation dialog
Description of the feature
Make the GIMP brush creation more "visual", in particular for GIH.
Use cases
Currently the format is very powerful, but creating a complex brush (with several dimensions) is an every-second fight. We have to mostly do try export, test, guess, try export, test, guess. Tiring and frustrating.
The dimension system could be made much more talkative with some visuals.
Also maybe it could be worth moving part of the creation as a core feature to have better interaction and also so that one can export a brush without having to know which folder to export to.
Note: reporting mostly for myself, as reminder, for when I have the time to work on this.