Feature: Ability to "deselect" an article from the WCD portlet, even if it is deleted.
Goal: to change a WCD portlet state back to as it was first deployed.
Use case: Admin deletes a web content from Control Panel, and the WCD portlet shows it as "deleted". If this happens the need would be to put the portlet into a state it was when there was no content in it.
Workaround cannot be used when the portlet is embedded: A possible workaround of course is to delete the portlet and add another one. This is not feasible if the page is coming from a template for example and the portlet is embedded to the template.