Send websocket message on lab opening
Summary
We should consider automatically opening up labs on the request page. If a lab was not yet open when the request page was opened, no new requests will show up for that lab in the table because the front-end thinks that this lab is 'filtered-out'/not relevant for the user.
Reasoning
Currently when a TA opens the request page before the lab has started, he/she won't be getting automatic updates regarding new requests once the lab has started.