ui: header action buttons

src/main/frontend/components/header.css

@@ -29,8 +29,8 @@
   }
 
   a.button {
-    padding: 0.1rem 0.3rem;
-    margin: 5px 2px;
+    padding: 0.25rem;
+    margin: 0 4px;
   }
 }