Add semantic query collection type for backend URL derivation (#486)

frontend/src/semantic-search/collection.ts

@@ -0,0 +1,13 @@
+import { extend } from 'lodash';
+
+import { apiRoot } from 'config.json';
+import Collection from '../core/collection';
+
+import SemanticQuery from './model';
+
+export default class SemanticQueries extends Collection<SemanticQuery> {}
+
+extend(SemanticQueries.prototype, {
+    url: `${apiRoot}query/`,
+    model: SemanticQuery,
+});