message: Return to normal mode after hitting <BS> on empty command line
  Fixes
diff: @@ -1853,6 +1853,7 @@ class CommandInsertInCommandline extends BaseCommand {
  // handle special keys first
  if (key === '<BS>' || key === '<shift+BS>' || key === '<C-h>') {
  if (vimState.statusBarCursorCharacterPos === 0) {
  + await vimState.setCurrentMode(ModeName.Normal);
  return vimState;
  }
  