sync: add group filtering

like for manual pulls, but persisted in the sync job config and visible
in the relevant GUI parts.

GUI is read-only for now (and defaults to no filtering on creation), as
this is a rather advanced feature that requires a complex GUI to be
user-friendly (regex-freeform, type-combobox, remote group scanning +
selector with additional freeform input).

Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
Reviewed-by: Dominik Csapak <d.csapak@proxmox.com>
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>

www/config/SyncView.js

@@ -1,7 +1,7 @@
 Ext.define('pbs-sync-jobs-status', {
     extend: 'Ext.data.Model',
     fields: [
-	'id', 'owner', 'remote', 'remote-store', 'store', 'schedule',
+	'id', 'owner', 'remote', 'remote-store', 'store', 'schedule', 'groups',
 	'next-run', 'last-run-upid', 'last-run-state', 'last-run-endtime',
 	{
 	    name: 'duration',
@@ -214,6 +214,12 @@ Ext.define('PBS.config.SyncJobView', {
 	    flex: 2,
 	    sortable: true,
 	},
+	{
+	    header: gettext('Backup Groups'),
+	    dataIndex: 'groups',
+	    renderer: v => v ? Ext.String.htmlEncode(v) : gettext('All'),
+	    width: 80,
+	},
 	{
 	    header: gettext('Schedule'),
 	    dataIndex: 'schedule',