[GUI|INTERNAL] removed auto follow option

1. the user should be asked on session invitation
if he/she would start in follow mode

2. you would be surprised that the feature is
currently not working as expected because all
editor related activities get discarded until
a / the new project is received.


Change-Id: Iedc920d0458a2ca96323640fa00f7209c400ac89
Reviewed-on: http://saros-build.imp.fu-berlin.de/gerrit/797
Tested-by: Jenkins CI
Reviewed-by: Stefan Rossbach <srossbach@arcor.de>