message: Allow specifying modifiers for mouse bindings
diff: @@ -532,7 +532,7 @@ impl<'a, A: ActionContext + 'a> Processor<'a, A> {
  return;
  }
  - self.process_mouse_bindings(ModifiersState::default(), button);
  + self.process_mouse_bindings(modifiers, button);
  }
  /// Process key input
  