- force hangup of user when he leaves the meeting. When users call in through the phone, they don't get ejected
   from the meeting when they logout.

This reverts commit 961626f4.

 - reset videoHolder dimensions and position to display properly when user publish,stop, then publish webcam

Slight refactoring of getJoinURLwithDynamicConfigXML() to make consistent with other functions in bbb_api.jsp

 - fixed problem where senders message gets displayed on all tabs in his private chat message window

Hotkey cleanup

private chat tabs now adjust to the current font size when opened