message: fix: max width for omemo clean up hint
diff: @@ -46,7 +46,7 @@ function addCleanUpAction(omemo: Omemo, dom: JQuery) {
  buttonElement.appendTo(dom);
  let explanationElement = $('<p>');
  - explanationElement.addClass('jsxc-hint');
  + explanationElement.addClass('jsxc-hint jsxc-max-width');
  explanationElement.text(Translation.t('omemo-clean-up-explanation'));
  explanationElement.appendTo(dom);
  }
  