api2/config/datastore: change create datastore api call to a worker

so that longer running creates (e.g. a slow storage), does not
run in a timeout and we can follow its creation

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

www/window/DataStoreEdit.js

@@ -75,6 +75,7 @@ Ext.define('PBS.DataStoreEdit', {
     isAdd: true,
 
     bodyPadding: 0,
+    showProgress: true,
 
     cbindData: function(initialConfig) {
 	var me = this;