Added GitHub Issues/PRs events rendering

Originally, when you selected Manage GitHub Issues or PRs and opened some issues/PR. You could have only seen messages posted by users, but not when a label was assigned or when the issue/PR was closed.

Well…

Now you can! Now it displays the exact action that happened and when it happened! Of course, it is also translated to all languages that Helyx supports. Just making sure you didn’t think it wasn’t!

I also cleaned up the code a little bit. Removed some useless usings and some files were in the wrong namespace, so that is fixed too.