Messaging Mobile Application Security option

Messaging Mobile Application Security option Disable message preview should have another option

Messaging Mobile Application Security option Disable message preview setting
"Disable message preview on mobile device"

should be split into two options:
"Disable message preview on mobile device - Always"
and
"Disable message preview on mobile device - When Locked".

In the current option, since end users (iPhone) can select local options "Show Previews: " Always | When Unlocked (Default) | Never
the Control Hub option must be set for "Disable message preview on mobile device" to protect against user selection of "Always" when two levels of security at Control Hub to match what is available on the device would be more efficient and permit the intermediate option to be used.