UI: Add template style overrides for user badges

templates/custom/header.tmpl

@@ -186,6 +186,21 @@
   #navbar .dropdown .item {
     justify-content: flex-start;
   }
+
+  /* User badges */
+  .user-badges {
+    /* Some rules override Gitea defaults. */
+    display: flex;
+    flex-wrap: wrap;
+    justify-content: center;
+    gap: 16px; /* --spacer */
+    padding: 0;
+    width: 100%;
+  }
+
+  .user-badges li {
+    list-style: none;
+  }
 </style>
 
 <script defer data-domain="projects.blender.org" src="https://analytics.blender.org/js/script.js"></script>