[Feature Request] Collection media statistics

[jorenn92]

As discussed in : #452

Add statistics to collection media with information on why it matches all the rules.

[jorenn92]

When clicking on a collection on the collections page, you're currently only able to view the media that's in it. Add a 'menu' at the top to switch between 'media' and 'statistics'. On the statistics page, there should be information about the collection (how many items it handled, when it was last ran, what items it removed,..).

On the media screen, there should be a switch to enable 'excluded' items. If enabled, show greyed out media items that would be part of the collection if they weren't excluded. Each media card also needs a button to open a (popup)window containing statistics on why it matches the rules of this collection.

So to cut this feature in pieces:

• Add a statistics page to media cards that opens a popup(window) where you can see why an item matches each rule
• Add a toggle on the media screen where you can toggle excluded items (greyed out)
• Add a more global 'statistics' screen that houses collection information and logs