Support for more mouse buttons (undo/redo?)

Requested feature

Add support for the undo and redo buttons common on computer mice.

Possible drawbacks

undo and redo buttons might not be supported by the programming libraries in use. However, Nautilus supports undo and redo buttons.

Possible alternatives

None.

Use case

Undo and redo buttons are convenient and commonplace.

Oddly, when these buttons are pressed, it functions as a left click, or says, "context.set_source_rgba() argument after * must be an iterable, not NoneType"

i have a mouse with 2 more buttons, but in nautilus or firefox they act as "previous/next" rather than "undo/redo"

are you talking about another set of buttons? if yes, i'll have issues developing and testing the feature since i don't have them. And if no, well, it would look bad if i implemented an inadequate behavior for those buttons

@maoschanz Those are the exact buttons I am talking about. I never saw them as "previous/next" buttons, but I think that makes more sense now that I think about it. I guess the "undefined behavior" could still be patched.

yes i'll look at this issue

if i find a use for these buttons i'll remember to implement it