Remove the word 'More' in the row actions split button

The split button dropdown doesn't need the term 'More',
the caret icon is enough.  See bug report for example.
(It gives us more room for long primary button names like
'Edit Hosts Aggregate')

Change-Id: Ib789f9c5691cb0cec026ee8d877e6385315b00a7
Closes-Bug: #1357487
Merge "Remove the word 'More' in the row actions split button"