[FR] Create "Clear Subscriptions" button at bottom of each page

For example, I have 1000 unviewed wallpapers in my subscriptions, but I don't have time to view them all at once, so I'd like to view only one page and mark it as viewed, and deal with the other pages as I have time to do so. This would require "Clear subscriptions from this page" button on each page, rather than the current one button that clears the entire list.