Suggestion: Simplify design of the issues view

Reduce horizontal bars and clutter with https://news.ycombinator.com/item?id=12146599

  • hide "Open", "Closed", "All" in a status dropdown
  • Move the RSS icon somewhere to a dropdown + use a meta tag, people who use it will figure it out
  • Move "Filter by name" to the filter menu or even better: switch the top search to "Search issues" with a dropdown to change it again
  • Move "Issues, Labels, Milestones" where "Open, Closed, All" was before. Boom, one less horizontal navigation.
  • Remove the TODO icon at the top right
  • Remove one or two items of the project navigation
  • Combine some of the project settings items, especially the lesser used
  • Move the user icon from the top right to the left and replace the hamburger, since the navigation below is really the user menu.

/cc @jschatz1 @dzaporozhets