Fix backspace not working in the invite dialog (#7931)

src/components/views/dialogs/InviteDialog.tsx

@@ -805,7 +805,7 @@ export default class InviteDialog extends React.PureComponent<IInviteDialogProps
  private onKeyDown = (e) => {
  if (this.state.busy) return;
 
- let handled = true;
+ let handled = false;
  const value = e.target.value.trim();
  const action = getKeyBindingsManager().getAccessibilityAction(e);
 
@@ -815,21 +815,22 @@ export default class InviteDialog extends React.PureComponent<IInviteDialogProps
 
  // when the field is empty and the user hits backspace remove the right-most target
  this.removeMember(this.state.targets[this.state.targets.length - 1]);
+ handled = true;
  break;
  case KeyBindingAction.Space:
  if (!value || !value.includes("@") || value.includes(" ")) break;
 
  // when the user hits space and their input looks like an e-mail/MXID then try to convert it
  this.convertFilter();
+ handled = true;
  break;
  case KeyBindingAction.Enter:
  if (!value) break;
 
  // when the user hits enter with something in their field try to convert it
  this.convertFilter();
+ handled = true;
  break;
- default:
- handled = false;
  }
 
  if (handled) {