fdo#84293 move clipboard functions to the top of context menu

Change-Id: I3be93178a9b4ba5ecfcb328a8235d2ae2cb17bcd
Reviewed-on: https://gerrit.libreoffice.org/13216
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>