message: Add Ctrl+c binding for exiting hint mode
diff: @@ -115,8 +115,8 @@ impl HintState {
  '\x08' | '\x1f' => {
  self.keys.pop();
  },
  - // Cancel hint highlighting on ESC.
  - '\x1b' => self.stop(),
  + // Cancel hint highlighting on ESC/Ctrl+c.
  + '\x1b' | '\x03' => self.stop(),
  _ => (),
  }
  