This feature seems not to be implemented but why not use the reload option of your browser?
Keyboard shortcut usually is Ctrl-R or in the address line there is a circular arrow for your mouse click.
As far as I can tell there is no chat functionality (push functionality, automatic browser update) implemented. Would be nice but there sure are alot of more severe conctruction sites which have to be dealt with first.
Guess this thread should be moved to the "community Issues" group -> https://community.ptc.com/t5/community-Issues/bd-p/CommunityIssues