FIX: ensure we can write to the localStorage

app/assets/javascripts/discourse/lib/emoji/emoji-toolbar.js.es6

@@ -87,7 +87,7 @@ var initializeUngroupedIcons = function(){
 
 try {
   if (localStorage && !localStorage.emojiUsage) { localStorage.emojiUsage = "{}"; }
-} catch(e){
+} catch (e) {
 /* localStorage can be disabled, or cookies disabled, do not crash script here
  * TODO introduce a global wrapper for dealing with local storage
  * */

app/assets/javascripts/discourse/lib/key-value-store.js.es6

@@ -5,13 +5,15 @@ try {
   safeLocalStorage = localStorage;
   if (localStorage["disableLocalStorage"] === "true") {
     safeLocalStorage = null;
+  } else {
+    // makes sure we can write to the local storage
+    safeLocalStorage["safeLocalStorage"] = true;
   }
-} catch(e){
+} catch (e) {
   // cookies disabled, we don't care
   safeLocalStorage = null;
 }
 
-
 const KeyValueStore = function(ctx) {
   this.context = ctx;
 };
@@ -56,9 +58,8 @@ KeyValueStore.prototype = {
 
   getObject(key) {
     if (!safeLocalStorage) { return null; }
-    try {
-      return JSON.parse(safeLocalStorage[this.context + key]);
-    } catch(e) {}
+    try { return JSON.parse(safeLocalStorage[this.context + key]); }
+    catch (e) {}
   }
 };
 
@@ -69,5 +70,4 @@ KeyValueStore.prototype.setItem = function(key, value) {
   this.set({ key, value });
 };
 
-
 export default KeyValueStore;