Merge pull request #1110 from sharelatex/jel-tab-focus-accessibility

Fix tab focus styling

GitOrigin-RevId: bb94e07b0d8dfd9c20cf2b0ef9db3d33d9c333db

services/web/public/stylesheets/components/tabs.less

@@ -14,7 +14,7 @@
     a {
       border: 0;
       color: @link-color-alt;
-      &:hover {
+      &:focus, &:hover {
         background-color: transparent!important;
         border: 0!important;
         color: @link-hover-color-alt;