As Google abandoned the XMPP protocol GMail doesn't work with WireShare anymore, and when one tries to log in the error displayed is the following: "The user name or password you have entered is incorrect." which may cause misunderstantings.
It would therefore be nice to remove the GMail option from the window obtained by clicking on Friends > Sign in.
I know that Google has abandoned the XMPP protocol and I was about to remove it as an option in WireShare but then it started working again. I am signed in to Gmail on WireShare at this moment. Their server must have been offline for a time but it is working now.