Search improves (#67)

* ESC should go back from search
using direct onKeyDown here as react-keydown does not trigger within an input

* Addressable search urls

frontend/utils/routeHelpers.js

@@ -0,0 +1,13 @@
+// @flow
+
+export function homeUrl() {
+  return '/dashboard';
+}
+
+export function newCollectionUrl() {
+  return '/collections/new';
+}
+
+export function searchUrl(query: string) {
+  return `/search/${query}`;
+}