* Use hidden instead of storage-hidden class * Refactor storage events * Make ID more generic * Update how persistent storage is activated * Add null checks * Update HTML/ID * Disallow disabling persistent storage * Refactoring * Update more IDs * Disable multiple simultaneous stats updates * Store node references * Move undefined assignment
* Rename SettingsBackup to BackupController * Rename files to more closely match classes * Improve organization of script imports