[Feature]: Add support for mouse side buttons

[Inevitabilis]

Mouse side buttons (commonly referred to as mouse button 4 and mouse button 5, sometimes - forward button and back button) commonly act across various applications (browsers, file browsers) as substitutes for "go back one page" and "go forward one page" functions, allowing this functionality in ProjectRover would decrease the delay between wanting to move across history and actually moving across history, hence improving responsivity and general user experience.

[lextm]

Not a lot of apps are there with such features (Safari etc on macOS don't support such for example).