Fix unarchiving of the widget manager config. (#6541)

Riot/Managers/Widgets/WidgetManager.m

@@ -779,6 +779,8 @@ NSString *const WidgetManagerErrorDomain = @"WidgetManagerErrorDomain";
         NSData *configsData = [userDefaults objectForKey:@"integrationManagerConfigs"];
         if (configsData)
         {
+            // We need to map the config class name since the bundle name was updated otherwise unarchiving crashes.
+            [NSKeyedUnarchiver setClass:WidgetManagerConfig.class forClassName:@"Riot.WidgetManagerConfig"];
             configs = [NSMutableDictionary dictionaryWithDictionary:[NSKeyedUnarchiver unarchiveObjectWithData:configsData]];
         }