Implemented Widget Definition option: Require cover or content image

I've added a new option to a couple of the existing Widget Definitions included with Showcase (Showcase: Latest items and Showcase: Featured items)

As you can see in the image below, there is a new check box input that allows you to require that an item has a cover image set or be in a category that has a category content image set, in order for an item to be fetched and displayed in the widget.




Here we can see a widget that does not have the option set, so its going to fetch all items, regardless if they have a cover image set or are within a category that has a category content image set.




And here you can see the result of enabling the option. The item "Test Test Test" is no longer fetched as it does not have a cover image set, nor is it in a category that has a category content image set.