Refactor app menu, add place lists

Unify sidebar, make everything route-based

app/routes/lists/index.js

@@ -0,0 +1,3 @@
+import Route from '@ember/routing/route';
+
+export default class ListsIndexRoute extends Route {}

app/routes/lists/list.js

@@ -0,0 +1,17 @@
+import Route from '@ember/routing/route';
+import { service } from '@ember/service';
+
+export default class ListsListRoute extends Route {
+  @service storage;
+
+  async model(params) {
+    const listId = params.list_id;
+    try {
+      const places = await this.storage.getPlacesInList(listId);
+      return { listId, places };
+    } catch (e) {
+      console.error('Failed to load places in list', listId, e);
+      return { listId, places: [] };
+    }
+  }
+}