Properly handle place removals

* Transition to OSM route or index instead of staying on ghost route/ID
  (closes sidebar if it was a custom place)
* Ensure save button and lists are in the correct state

tests/acceptance/navigation-test.js

@@ -42,6 +42,9 @@ class MockStorageService extends Service {
   findPlaceById() {
     return null;
   }
+  isPlaceSaved() {
+    return false;
+  }
   loadPlacesInBounds() {
     return [];
   }

tests/acceptance/search-test.js

@@ -41,6 +41,9 @@ module('Acceptance | search', function (hooks) {
       findPlaceById() {
         return null;
       }
+      isPlaceSaved() {
+        return false;
+      }
       rs = {
         on: () => {},
       };
@@ -85,6 +88,9 @@ module('Acceptance | search', function (hooks) {
       findPlaceById() {
         return null;
       }
+      isPlaceSaved() {
+        return false;
+      }
       rs = {
         on: () => {},
       };
@@ -130,6 +136,9 @@ module('Acceptance | search', function (hooks) {
         if (id === '999') return this.savedPlaces[0];
         return null;
       }
+      isPlaceSaved(id) {
+        return !!this.findPlaceById(id);
+      }
       rs = {
         on: () => {},
       };