UI: Fix repo header issues (#5995)

Fixes: #5985

Author: silverwind

public/css/index.css

@@ -4,9 +4,7 @@
     padding-top: 15px;
     padding-bottom: @footer-margin * 2;
 
-    .header-grid {
-        padding-top: 5px;
-        padding-bottom: 5px;
+    .repo-header {
         .ui.compact.menu {
             margin-left: 1rem;
         }
@@ -19,10 +17,10 @@
         }
         .ui.huge.breadcrumb {
             font-weight: 400;
-            font-size: 1.7rem;
+            font-size: 1.5rem;
         }
         .fork-flag {
-            margin-left: @mega-octicon-width + 8px;
+            margin-left: @mega-octicon-width + 6px;
             margin-top: 3px;
             display: block;
             font-size: 12px;
@@ -1867,7 +1865,6 @@ tbody.commit-list {
     flex-wrap: wrap;
 }
 
-.repo-header .repo-title,
 .repo-header .repo-buttons {
     display: flex;
     align-items: center;