Stub out service desk filtered search.

app/assets/javascripts/service_desk_issues/filtered_search.js

+export default class FilteredSearchServiceDesk extends gl.FilteredSearchManager {
+  constructor() {
+    super('service_desk');
+
+    this.cantEdit = [{ }];
+  }
+
+  canEdit(tokenName) {
+    return this.cantEdit.indexOf(tokenName) === -1;
+  }
+}
+
+new FilteredSearchServiceDesk();

app/assets/javascripts/service_desk_issues/index.js

-console.log("Service desk issues entry point");
+import FilteredSearchServiceDesk from './filtered_search';
+// bulk edit?