When creating a dialog in a legacy app using the old UI framework (UI 5), for example, the old pages app, the dialog is automatically full screen.
If you try to use the wide property in a dialog component, it will not make a difference, it's still full screen.

Steps to reproduce

1. Create a simple dialog for a component

   form:
     tabs:
       - name: tabText
         label: Textold
         wide: true
         fields:
           - name: title
             fieldType: text
             label: Title
             rows: 5
             maxLength: 300
   actions:
     commit:
       label: save changes
       class: info.magnolia.ui.admincentral.dialog.action.SaveDialogActionDefinition
     cancel:
       label: cancel
       class: info.magnolia.ui.admincentral.dialog.action.CancelDialogActionDefinition
   

1. Go to the legacy pages app, and create the component.
2. Note that the dialog is full screen, even the dialog to create the components is full screen.
   
3. Try to set the wide property to false in the dialog component with no effect

Expected results
The dialogs should be full screen only if the wide property is set to true.
 
Actual results
All dialogs are full screen in legacy apps and it's not possible to change it.