Bug Fixes:
I#203 - Google book: Do not use progress callbacks in libgdata sync API (Milan Crha)
I#204 - GOA-configured Nextcloud account not appearing (Milan Crha)
I#206 - LDAP: Incorrectly converts SExp to LDAP query (Milan Crha)
Miscellaneous:
ESourceRegistryWatcher: The 'filter' signal listener should not be required (Milan Crha)