message: Exiting CommandMode as in Vim
  This fixes adding the missing key bindings to exit CommandMode:
  * <C-[>  which is the same as <Esc>
  * <C-c>
diff: @@ -1856,7 +1856,7 @@ class CommandInsertInCommandline extends BaseCommand {
  @RegisterAction
  class CommandEscInCommandline extends BaseCommand {
  modes = [ModeName.CommandlineInProgress];
  - keys = ['<Esc>'];
  + keys = [['<Esc>'], ['<C-c>'], ['<C-[>']];;
  runsOnceForEveryCursor() {
  return this.keysPressed[0] === '\n';
  }
  