Centralize loading of accounts and identities

dev/Screen/User/MailBox.js

@@ -67,6 +67,7 @@ export class MailBoxUserScreen extends AbstractScreen {
 	 * @returns {void}
 	 */
 	onRoute(folderHash, page, search, messageUid) {
+		// Only works when FolderUserStore.folderList() is loaded
 		const folder = getFolderFromHashMap(folderHash.replace(/~([\d]+)$/, ''));
 		if (folder) {
 			FolderUserStore.currentFolder(folder);