Ensure map marker clicks preserve search context

Fixes the back button just closing the sidebar and clearing the whole
search after having seleted a result via map marker

app/routes/search.js

@@ -170,6 +170,10 @@ export default class SearchRoute extends Route {
     // Ensure pulse is stopped if we reach here
     this.mapUi.stopSearch();
     this.mapUi.setSearchResults(model);
+
+    // Store current search params to allow "Up" navigation from place details
+    const { q, category, lat, lon } = this.paramsFor('search');
+    this.mapUi.currentSearch = { q, category, lat, lon };
   }
 
   @action