Manage Panel in app
$app : \Lobby\Apps\Lobby\App
$appID : string
__construct(\Lobby\App $App)
addTopItem( $id, $info)
removeTopItem( $id, $position)
getTopItems( $position)
addLeftItem( $id, $info)
removeLeftItem( $id, $position)
getLeftItems( $position)
addNotifyItem( $id, $info)
removeNotifyItem( $id)
changeToAppRelativeURLs( $array)