product - ui - change label assignment notice to be message

Updating the notices generated for the auto-assignment of
label to be a 'message' vs 'success'.  This was the original
intent; however, appears to have been change during a merge
conflict resolution.
providers - ui - fix alignment of Add Product button

When the width of the UI was increased, the format/location
of the Add Product button got inadvertantly moved.  This
commit pushes the button back to the left where it was originally.
Merge pull request #1945 from bbuckingham/fork-bug_fixes

providers/products - ui - 2 small bug fixes