* Show "No Available Printers" Instead of an Empty Printer Dropdown
A ComboBox with no items opened a one-row-high popup that DropDown never
paints, leaving a blank strip with stale pixels under the box. Don't open
the list when it is empty, and label the printer box in the print and
send-to-printer dialogs when no printer is available.
* Add "No Available Printers" to the Translation Template