An area which has a dialog defined within it shows the dialog after a component it's created on it. 

Steps to reproduce:

1. Edit /mtk/templates/pages/basic.yaml by adding: dialog: mtk:pages/myDialog
2. Create myDialog.yaml at /mtk/dialogs/pages/
3. Place the following code snippet:

   form:
     tabs:
       - name: tabMain
         fields:
   
           - name: title
             required: true
             class: info.magnolia.ui.form.field.definition.TextFieldDefinition
   
   actions:
     commit:
       class: info.magnolia.ui.admincentral.dialog.action.SaveDialogActionDefinition
     cancel:
       class: info.magnolia.ui.admincentral.dialog.action.CancelDialogActionDefinition
    

4. Go to pages-app, create a Basic page and in the Main area create a component.
5. Check that after saving the component, the "myDialog" dialog pops

If you do this very same test on the old pages app the dialog does not pop.

Notes
The footer area of the stk site definition.