Load issues (and PRs) in modals #1293

It goes without saying that modals ideally take away a lot of loading requirement for the end user and when browsing many issues (i.e. on a repo such as this one) having to load all those individual pages takes either a lot of separate tabs or a lot of wasted time.

That said I want to suggest the feature to instead open issue pages in modals overlaying the scrollable area that GitHub already has for the issues page. An example for this concept can be taken from how the Reddit redesign handles opening posts through modals that are infinitely scrollable and close upon clicking anywhere not inside the modal.

All in all, this will allow for rapid navigation between many issues while still retaining the full view of an issue and its comments.

Taken from /r/git as example image:

Mockup made by me using this repo's issue tracker at time of writing: