Add edit button to mobile file view

What does this MR do?

Adds edit button to mobile file view.

Also adds delete, viewer switcher, copy blob source, and open raw blob.

Are there points in the code the reviewer needs to double check?

Is it OK to duplicate the action buttons in the markup? Not ideal but meets the goal by complimenting existing buttons hidden by hidden-xs.

Why was this MR needed?

Unable to edit through the web on mobile view. Only work around is to manually change the URL.

Screenshots (if relevant)

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Documentation created/updated
• API support added
• Tests added for this feature/bug
• Review
  • Has been reviewed by UX
  • Has been reviewed by Frontend
  • Has been reviewed by Backend
  • Has been reviewed by Database
• Conform by the merge request performance guides
• Conform by the style guides
• Squashed related commits together

What are the relevant issue numbers?

Closes #28377 (closed)

Related #15350 (closed)