KolabMailAccess: added full sync to offline->online transition
KolabMailAccess: added full sync to offline->online transition

* added a call to the Synchronizer full_sync() function at
  the end of the KolabMailAccess offline->online state
  transition function
* via this call, ensure that all SideCache objects get
  written out to the server when switching from offline
  to online operational mode
  (kolab_mail_synchronizer_full_sync() needs implementation)

GNOME/evolution-kolab,GNOME/evolution-kolab