[zeditor] Bogus horizontal submenu appearing where Graphics submenu is

Steps to recreate:

1. Quest->Graphics->Door Combo Sets
2. Click 'Edit'
3. Click 'Auto'
4. Observe partially occluded Quest->Graphics submenu is replaced with "File Quest Edit View" horizontal submenu
5. Click 'OK'
6. Now bogus submenu is more visible

The "Auto" string comes from the doorcomboset_dlg array in zq_doors.cpp