CSS navbar and color tweaks (#13609)

* CSS and color tweaks

- Unify navbar-style menus
- Fix admin bar overlapping menu bar
- Fixes file edit comment box
- Fix double border on review box
- Fix review timeline icons

* Many fixes to new-menu and navbar layout enhancements

* misc settings fixes

* navbar tweak

* fix pr tabs

* branch tag and arc color tweaks

templates/user/profile.tmpl

@@ -1,5 +1,5 @@
 {{template "base/head" .}}
-<div class="user profile">
+<div class="user profile mt-5">
 	<div class="ui container">
 		<div class="ui stackable grid">
 			<div class="ui five wide column">