Incorrect filament profile being used during purge - always set to PLA. #1691
at the firmware. The M220 B / M220 R are only applied for MM prints without any flex or soluble (PVA, BVOH) material, as for these materials the MMU slows down the print using the M220 code. fixes "LCD Speed Modifier Lost on Tool Change #421"
exchange sequences configurable.
The XS was left only for the unit / integration tests, and it links libslic3r only. No wxWidgets are allowed to be used from Perl starting from now.