The application offers switching printings for SLD reversible cards, but then fails when trying to switch printings of back faces of those.

Outline

• Only those SLD printings have a back face. Other printings have the regular magic card back.
• The face count of those printings is different, so the number of printed cards is different for the reversible printing and the regular printing.
• Switching away from a reversible to a non-reversible printing:
  • Look for a front-side printing, regardless of the current face being the front or back
  • Also remove the other face. Scan the document for a matching face and remove it
• Switching to a reversible printing:
  • Also add the back face
• The same applies for art series cards

A partial fix is applied: The set selection code now takes the front/back property into account. The back faces of those reversible cards no longer offer switching away to other sets that only contain single-sided versions.