message: Let users paste text if they've already started filtering invite targets
  Fixes
diff: @@ -747,6 +747,12 @@ export default class InviteDialog extends React.PureComponent {
  };
  _onPaste = async (e) => {
  + if (this.state.filterText) {
  + // if the user has already typed something, just let them
  + // paste normally.
  + return;
  + }
  +
  // Prevent the text being pasted into the textarea
  e.preventDefault();
  