for in the PresetCollection: The 1st preset is always the "-- default --" even if there are some presets starting with an ASCII character lower than '-'. https://github.com/prusa3d/Slic3r/issues/603
for in the PresetCollection: The 1st preset is always the "-- default --" even if there are some presets starting with an ASCII character lower than '-'. https://github.com/prusa3d/Slic3r/issues/603