New codes -update

notification.admin.persistent={"delivery":"PERSISTENT","display":"POP_UP","image":"${image.library.url}album1358/frank_wave_001.gif"}
notification.admin.transient={"display":"POP_UP","image":"${image.library.url}album1358/frank_wave_001.gif"}

Update:

notification.admin.title=Message From Hotel Staff
notification.forums.error.access_denied.message=Seems like you do not have rights to perform requested action. Please refresh forum view.
notification.forums.error.access_denied.title=Forum Authorization Failed