This change moves the "Add Comment" or "Review" items into an "Actions"

drop-down within the file attachment box. This is in preparation for adding an

"Update" action which will allow the user to replace an existing attachment

with a new version.
In order to make the drop-down not super ugly, I've changed the bottom-left

corner of the "Actions" label to be square instead of rounded.

Verified the visual appearance of the different menus, both as-is and with

  the "Update" button un-commented.
Checked that the actions still worked.