UI: Keep repo URL action right of ref combo & path

Just use secondary menu instead custom ".head.meta", which simplifies code.

Also do not display repo URL action when we are in subdirectory or viewing a
file.

public/less/_repository.less

@@ -139,22 +139,6 @@
 				font-size: 1.4em;
 			}
 		}
-		.head.meta {
-			padding: 0;
-			li {
-				list-style: none;
-				display: inline-block;
-
-				.ui.breadcrumb {
-					margin-top: -5px;
-
-					span,
-					a {
-						font-size: 16px;
-					}
-				}
-			}
-		}
 
 		#repo-files-table {
 			thead {