Menu Manager: Menu Items > Moved "Trash" button to the right

See overall issue Inconsistency in order of admin "edit" etc buttons #4963

This patch is a replacement patch for patch http://issues.joomla.org/tracker/joomla-cms/4967
Merge pull request #5026 from pe7er/patch-13

Menu Manager: Menu Items > Moved "Trash" button to the right