iqdb: hide low similarity results behind "show" link.

app/javascript/src/javascripts/iqdb_queries.js

@@ -0,0 +1,11 @@
+let IqdbQuery = {};
+
+IqdbQuery.initialize_all = function() {
+  $(document).on("click.danbooru", "a.toggle-iqdb-posts-low-similarity", function(event) {
+    $(".iqdb-posts-low-similarity").toggle();
+    $("a.toggle-iqdb-posts-low-similarity").toggle();
+    event.preventDefault();
+  });
+};
+
+$(document).ready(IqdbQuery.initialize_all);