Shows the edit comment button on mobile

## What does this MR do?

Shows the edit comment button on mobile.

## What are the relevant issue numbers?

Closes #17214 

## Screenshots (if relevant)

![Screen_Shot_2016-06-01_at_12.33.13](/uploads/d46b800c175a53821ea8e8af49c07641/Screen_Shot_2016-06-01_at_12.33.13.png)

See merge request !4402