Disable 1, 2, 3, 4, 5, P and Space shortcuts when saving

I was using this software on a recent game jam and had trouble saving the files. Turns out the problem was because I was typing numbers when writing the file name, pressing 1 to 5 would change the sound slot. This commit basically disables all of the shortcuts that we press while typing (P, space and 1 to 5 numbers), this way the user can type them without triggering them.