Misc updates and clean up

- WipeTower: use filament_ramming_volumetric_speed(_nc) for ramming, falling back to
  max_vol_speed only when nil; gate precool temps on enable_pre_heating
- ToolOrderUtils: disable the inter-layer forecast in the per-nozzle base reorder so
  H2D/H2C ordering is unchanged
- PrintConfig: stop stripping filament_prime_volume in handle_legacy; document that
  prime_volume drives the Type2 wipe tower and filament_prime_volume the Type1 one
- GCodeProcessor: exclude post-print end-gcode M400 dwells from the M73 estimate and
  drop the dead air-filtration state
- Trim verbose BambuStudio source-location comments across the port

src/libslic3r/PrintConfig.cpp

@@ -7384,7 +7384,7 @@ void PrintConfigDef::init_fff_params()
     def->tooltip = L("The flush multiplier used in fast purge mode.");
     def->set_default_value(new ConfigOptionFloats{1.2});
 
-    // BBS
+    // Orca: used by the generic (Type2) wipe tower; also the fallback for filament_prime_volume on Type1.
     def = this->add("prime_volume", coFloat);
     def->label = L("Prime volume");
     def->tooltip = L("This is the volume of material to prime the extruder with on the tower.");
@@ -8030,7 +8030,8 @@ void PrintConfigDef::init_fff_params()
     def->mode = comDevelop;
     def->set_default_value(new ConfigOptionBool(false));
 
-    // Reference to BBS: BambuStudio/src/libslic3r/PrintConfig.cpp L2617-2624
+    // Used by the Type1 wipe tower: filament_prime_volume on a filament change,
+    // filament_prime_volume_nc on a hotend/nozzle change. Type2 uses prime_volume instead.
     def           = this->add("filament_prime_volume", coFloats);
     def->label    = L("Filament change");
     def->tooltip  = L("The volume of material required to prime the extruder on the tower, excluding a hotend change.");
@@ -9059,7 +9060,7 @@ void PrintConfigDef::handle_legacy(t_config_option_key &opt_key, std::string &va
         "retraction_distance_when_cut",
         "internal_bridge_support_thickness", "top_area_threshold", "reduce_wall_solid_infill","filament_load_time","filament_unload_time",
         "smooth_coefficient", "overhang_totally_speed", "silent_mode",
-        "overhang_speed_classic", "filament_prime_volume",
+        "overhang_speed_classic",
         "anisotropic_surfaces", // superseded by top_surface_fill_order / bottom_surface_fill_order
     };