Hide questions in Q&A Panel in Events

Sometimes when running events we get lots of questions or people sending comments in Q&A, whilst you can dismiss them, they do not clear from the Q&A menu, making it very cluttered and easy to lose your place. Please enable a way for a panelist to clear messages from the q&a panel, perhaps adding them to a sub tab of "completed or dealt with" so that they can be referred back to if required.