Refactor app menu, add place lists

Unify sidebar, make everything route-based

app/modifiers/restore-scroll.js

@@ -0,0 +1,10 @@
+import { modifier } from 'ember-modifier';
+
+export default modifier((element, [scrollTop]) => {
+  if (element && typeof scrollTop === 'number' && scrollTop > 0) {
+    // Restore inside requestAnimationFrame to guarantee layout rendering is ready
+    requestAnimationFrame(() => {
+      element.scrollTop = scrollTop;
+    });
+  }
+});