Primitivus: better popups handling:

- widget to remove can now be specified in removePopUp: if it is not the current one, it will be removed from queue
    - Primitivus.Alert method is a shortcut to display an Alert which will be removed on "OK" press
    - showDialog is now obsolete and removed, if generic dialog creation is needed, XMLUI can be used

frontends/src/quick_frontend/quick_app.py

@@ -742,6 +742,7 @@ class QuickApp(object):
         if data is None:
             data = dict()
 
+
         def action_cb(data):
             if callback is None:
                 self.actionManager(data, profile=profile)