Fixing FindIn hotkey registering/unregistering

Handing hotkey registering with the Frisk window minimizing
Fixing FindIn search window crash
Removing RegisterHotKey/UnregisterHotKey

Removing RegisterHotKey/UnregisterHotKey as the method to open the open
the FindIn dialog window. Using the window's hook for key presses
instead.
.gitignore update

Ignore *.tmp files