Hide icons in CLM1 and CLM2

Hi, 

Is it possible to hide the 'Padlock' and 'Unlock Padlock' icons in transaction codes CLM1 / CLM2?

I have checked via the configuration route under Set Field Selection for Notifications and under Influencing for Notification Type 'PR' I can not see the option to set these icons to 'Hide'

We have a requirement to hide the icons but to allow the users to still use the menu path Claim > Functions etc

Is there a suitable user exit we can use?

Regards

Gary B