We should ensure that the `Shift` is actually pressed when trying to
prefer regular bindings instead of the ones if we had Shift applied.
Fixes: 500b696ca8 (Prefer exact matches for bindings in mouse mode)
Fixes#7415.
The protocol enables robust key reporting for the applications, so
they could bind more keys and the user won't have collisions with
the normal control keys.
Links: https://sw.kovidgoyal.net/kitty/keyboard-protocolFixes#6378.
Kirill Chibisov