Added a temp measure for setting notifications to read without going to post page

Did some quick work on this. Hardest part was adding a button within an anchor link div (not best practice apparently) - the "Set to read" button is nested within the container notification box that's an anchor link to go to the post.

At least this is a bandaid patch to reduce friction of having to click through to each post page, even though a bunch are from the same post page. The ideal feature would be automatic sorting and grouping of notifications by unique posts - which will take longer to build! πŸ˜