Lock / Unlock icons in Proof

[#1]

Description - The experience in locking and unlocking a proof is inconsistent in different areas

Why is this feature important to you - to minimize confusion among users

How would you like the feature to work - Consistent icons and experience throughout

Current Behaviour - In the proofing tool when a proof is locked it appears as a locked padlock icon at the top of the page with a link to the right to unlock the proof. In the lef-hand nav menu to unlock you click on an icon that looks like an open padlock. In the workflow view in Workfront you click directly on a locked padlock icon to unlock the proof.