move formattings button tooltip to the code to make it more precise. Fixes #7389
use correct function to set tooltip
don't cycle through blobk nicknames when autocompletting nicks. Fixes #7398
don't allow to browse non-MUC server in join groupchat dialog.
don't try to get xid of a non-existing window
better way to set outgoing video in chat window
always present room JID LTR. Fixes #7402
fix more bidi things
fix direction mark