ENH: config: add the extruder variant apply logic in Print::Apply()

we need to keep the original values and update after pre-slice
jira: no-jira

Change-Id: I232d3c43340b4a23bc42121bd05380746e736f20
(cherry picked from commit 7b7ebf1b959ba5c967baff30fb226c808a2e7d44)

src/libslic3r/PresetBundle.cpp

@@ -2126,10 +2126,10 @@ bool PresetBundle::support_different_extruders()
     return supported;
 }
 
-DynamicPrintConfig PresetBundle::full_config(std::vector<int> filament_maps) const
+DynamicPrintConfig PresetBundle::full_config(bool apply_extruder, std::vector<int> filament_maps) const
 {
     return (this->printers.get_edited_preset().printer_technology() == ptFFF) ?
-        this->full_fff_config(true, filament_maps) :
+        this->full_fff_config(apply_extruder, filament_maps) :
         this->full_sla_config();
 }