Allow searching for activities in the mega-model

Refs pombase/pombase-gocam#142

Author: kimrutherford

gocam_view/templates/gocam_view/index.html

@@ -1186,8 +1186,7 @@
 
   const doSearch = (searchText) => {
     for (const node of nodes) {
-      if (isSmallJoin &&
-          (node.data.enabler_label &&
+      if ((node.data.enabler_label &&
            node.data.enabler_label.toLowerCase().includes(searchText) ||
            node.data.enabler_id &&
            node.data.enabler_id.toLowerCase().includes(searchText) ||