Allow binding special mouse buttons (4 and 5) in key bindings

[erasels]

Type of reader (if reader related)

None

Description of the new feature / enhancement

Right now it is not possible to bind keys to the special mouse buttons which are generally used for fowards/backwards processes in other applications. When trying to add them via the add key button in the shortcut menu, nothing happens.
While there is software to bind them to actual keys while this application is focused, such as AHK or XMouseButton Control, it would be nice to have inbuilt support.

Just to be clear, I mean these buttons.

Scenario when this would be used?

By default, these keys could be bound to next page/prev page or next chapter/prev chapter. This would allow for easy full-mouse control with minimal clicking.

Supporting information

No response

[mienaiyami]

Thank you for submitting issues.
Implementing them might take some time. I have paused work on Yomikiru due to some reason but will be resuming it soon.