Add own setting dialog for kolab resource

* add own defaults for kolabresource
  -> m_settings, onConfigurationDone  must be protected to be used from
  koloab resource

* modify setting dialog for kolab
  - add kolab icon for dialog
  - do not show "offline use" checkbox

KOLAB: 3022
stub in relations related functions to the kolab resource
KolabResource: no uneccessary debug output

We rely on this codepaths.
resource/kolab: Add functunality to edit buttons in wizard

The user should be able in any case to edit all configuations, that are
set via the accountwizard. Also if there are no autoconfig are found.

Additonaly use the new freebusy config file "akonadi-calendarrc".

KOLAB: 3728
kolabwizard: Added probing of server settings
added and removed relations support in resource state
react to changes in relations on items -> sync to server!
KolabResource: Properly retrieve and add items using the GID.
KolabResource: If there are no objects on the server, clear the local tags.
Merge remote-tracking branch 'remotes/kolab/dev/accountwizard_edit' into kolab/integration/4.13.0
Merge remote-tracking branch 'remotes/kolab/dev/resource_kolab_config' into kolab/integration/4.13.0
KolabResource: Use the just fetched tag to write back to the resource.
Merge remote-tracking branch 'kolab/feature/sync_relations' into kolab/integration/4.13.0