You can hide conversations on the left side of your messages by hovering your mouse under the time stamp and clicking on the (...) button that appears.
Hi, and thanks! When it finally worked, showing the options, it said "block the person/company's name". The problem is that I created a room, thinking I could write and start a message to a new client that a proposal had been submitted to. I want to check on their progress, find out if they have considered my proposal. So there is no active candidacy yet, since the client has not written to me. Do they have to create the room? Is there any way for me to delete the room I created?
In order for you to be able to further message the client, they'll need to accept your proposal and invite you for an interview. You'll see the proposal under Active Candidacies when that happens.