Mouse button back/forward event support

[MisterX2000]

Add support for mouse buttons 4 and 5, that are used for back and forward actions when navigating.

Similar to this issue on 7-Zip, which exists since 2010: https://sourceforge.net/p/sevenzip/discussion/45797/thread/fccff241/

[DevX-Cipher]

i dont see the interest of adding this support that why 7zip does not support it not many people have this option on a mouse