Using AppWithinMinutes.Title computed fields on non terminal page end by having WebHome set as default value in edit mode

Step to reproduce:

• Create a XClass and create a computed fields with value

  {{include reference="AppWithinMinutes.Title"/}}

• Create a non terminal page and add an object of the XClass that you created previously.
• Edit the object of the page.

Expected: if the title of the page is empty (so we use doc.name for the title) the value of the computed fields should be empty.

Currently: the title is set to WebHome.

This is more annoying when you have a sheet and you use a computed fields for the title. In this case at each edit (when the title is empty) the fields is set to WebHome and it need to be removed at each edit otherwise you page title will be set to WebHome.