Add Top Rail Button for Locking an Experience Fragment

[#1]

Request for Feature Enhancement (RFE) Summary:	Add a "Lock" button to the top rail in order to lock an experience more easily
Use-case:	Our content authors didn't even know they could lock experience fragments due to the button not existing in the standard location.
Current/Experienced Behavior:	There is a way to Lock experience fragments via the dropdown when in the editor for the page itself but you cannot lock it via the top rail lock button like you can for pages in Sites as well as with "Checkout" inside Assets.
Improved/Expected Behavior:	Lock button in top rail just like other content in AEM has.
Environment Details (AEM version/service pack, any other specifics if applicable):	AEM 6.5.8
Customer-name/Organization name:	Securian
Screenshot (if applicable):
Code package (if applicable):

[#2]

Hello @timothygrimes 

Thanks for proposing this idea

This has been reported to the engineering under the internal reference SITES-3948.
The product team will triage this request to verify feasibility based on the prioritization model. This post will be updated according to the Jira request status.

[#3]

How do we upvote this functionality? It needs to include the ability to bulk lock multiple XFs at the same time.