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

web_src/less/_user.less

@@ -1,10 +1,6 @@
 @import "variables.less";
 
 .user {
-  &:not(.icon) {
-    padding-top: 15px;
-  }
-
   &.profile {
     .ui.card {
       .header,