Reset voices when resetting player state.
Reset Freeverb comb filter properly.
Implement panic functionality.
Add panic button.
Rename panic functionality to silence.
Plug in icon for the silence button.
Use tfire for pausing via the silence action.
Stop all notes explicitly on silence.
Add atomic silence operation to the audio engine.
Add remark.
Set visibility manager closing status before hiding main window on exit.
Add sheet edit mode.
Update view when edit mode changes.
Enable rest button only in edit mode.
Enable trigger delete button only in edit mode.
Merge pull request #208 from kagu/panic_button2

Silence button
Merge pull request #209 from kagu/edit_mode

Edit mode