Add two new buttons for moving entries up and down in the list.
Change-Id: I90e5c5812754391651885e2a622148cecc124099
Reviewed-on: https://code.wireshark.org/review/24413
Petri-Dish: Stig Bjørlykke <stig@bjorlykke.org>
Tested-by: Petri Dish Buildbot
Reviewed-by: Anders Broman <a.broman58@gmail.com>