1.Always set filament retract params to filament_num size.In
gcode export module, we can always use filament idx to get
retract params
2. add logic in update_filament_maps_to_config to update the
retraction related params which can be overiden by filament
jira:NONE
Signed-off-by: xun.zhang <xun.zhang@bambulab.com>
Change-Id: Ia45dd1401aa3565d062d5da1c9f4a2ba8966f693
(cherry picked from commit 4b083d8d8220b8f65a1b804688cb2d6e238eb4e6)