ui: add SyncView

shows a nice overview of sync jobs (incl status of last run, estimated
next run, etc.) with options to add/edit/remove and also show the
log of the last run and manually run it now

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>

www/NavigationTree.js

@@ -36,6 +36,12 @@ Ext.define('PBS.store.NavigationStore', {
 			path: 'pbsRemoteView',
 			leaf: true,
 		    },
+		    {
+			text: gettext('Sync Jobs'),
+			iconCls: 'fa fa-refresh',
+			path: 'pbsSyncJobView',
+			leaf: true,
+		    },
 		    {
 			text: gettext('Data Store'),
 			iconCls: 'fa fa-archive',