Clownboard v1.0.4

Bug fixes

• F12 (and all hotkeys) broken after binding a sound to a control key — when 'stealing' a control key for a sound, the old code called \keyboard.add_hotkey('')\ to register an empty key, which corrupts the keyboard library state and silently breaks every hotkey registered after that point (including F12/pause). Now skips registration when the key is unset.
• Pause button always showed '(F12)' regardless of actual key — the tick loop hardcoded the string '(F12)' instead of reading the live pause key setting, so changing the pause key never updated the button label.
• Stop/Mute/Pause button labels now all update immediately when a control key is changed or stolen, including the mic state for the mute button.