Add model description to searched terms.

This adds the model description to the searchable terms.
This is particularly useful since the description can be used to store
arbitrary tags, independently from the filename, which is imposed by the
model publisher.

javascript/extraNetworks.js

@@ -52,7 +52,7 @@ function setupExtraNetworksForTab(tabname) {
             var searchTerm = search.value.toLowerCase();
             gradioApp().querySelectorAll('#' + tabname + '_extra_tabs div.card').forEach(function(elem) {
                 var searchOnly = elem.querySelector('.search_only');
-                var text = Array.prototype.map.call(elem.querySelectorAll('.search_terms'), function(t) {
+                var text = Array.prototype.map.call(elem.querySelectorAll('.search_terms, .description'), function(t) {
                     return t.textContent.toLowerCase();
                 }).join(" ");