Add Microsoft apps in favorites bar

silverlion thanks for the suggestion. We were chatting yesterday about ways to make it more obvious to users that edge://apps even exists, and this is a pretty good idea. You can do it yourself, of course, by simply clicking to Favorite edge://apps, but I kind of like the idea of having it there as a way to expose it. 

I've logged it as a bug internally for discussion with others on the team.

-John