Closes #24744
and should also fix #17819 

The change is split into two commits, first one adds F10 handling (it
needs to be handled inside `parse_syskeydown_msg_keystroke`, the second
one properly handles `Alt+Fn` combinations, this also needs to happen in
`parse_syskeydown_msg_keystroke` and is similar to a fragment inside
`parse_keydown_msg_keystroke`

Release Notes:

- Fixes F10 and Alt+Fn handling on windows