#6897 Modvis animation supports the synchronization of multiple browsers by groupid

It should be possible to synchronize (stop, continue, step, back and forward) the Modvis animation across several browser instances.

This can now be done via the URL parameter groupid. All users with the same groupid are synchronized.



On github the example has been extended:
​https://github.com/actifsource/ch.actifsource.example.modvis.server.standalone/