WIP: apply bootstrap theme

* BugFix search

resource/styles/scss/_search.scss

@@ -18,7 +18,7 @@
 
 .search-top, .search-sidebar {
   .search-input-group {
-    .search-clear {
+    .search-top-clear {
       position: absolute;
       z-index: 2;
       right: 28px;