Unify information for the sake of the UI consistency
Steps to reproduce
1. Product Menu > Content > Documents and Media
2. Add a document
3. Select the document created
4. Compare actions in the management bar with the actions in the contextual menu
- Change "Unlock" tooltip with "Checkin"
- Change "Lock" tooltip with "Checkout"
- Checkin a document with the management bar must show the "Describe changes" modal window as it's shown when a user does the checkin using the contextual menu.