Attempt to count the total number of entries only after feeds have been loaded.
findSvc.find_feed() angularjs service method has better safeguards when the feeds list has not been loaded yet, or the $filter service returns no results.
findSvc.find_folder() angularjs service has better controls for the case when the folders list has not yet been loaded, or the $filter service returns no results.
findSvc.find_folder_feeds() angularjs service now has better controls for the case in which the list of folders has not been loaded yet, or the $filter service returns no results.
feedsFoldersSvc.folder_unread_entries() angularjs service not has better controls for the case in which no feeds are found in a given folder.