message: Fix disabled save button on message editor when pasting
diff: @@ -179,6 +179,7 @@ export default class BasicMessageEditor extends React.Component {
  const {partCreator} = model;
  const text = event.clipboardData.getData("text/plain");
  if (text) {
  + this._modifiedFlag = true;
  const range = getRangeForSelection(this._editorRef, model, document.getSelection());
  const parts = parsePlainTextMessage(text, partCreator);
  replaceRangeAndMoveCaret(range, parts);
  