Activate all fans cooling during switch for UM printers

CURA-11795

resources/definitions/ultimaker.def.json

@@ -36,6 +36,7 @@
         "bridge_wall_coast": { "value": 0 },
         "bridge_wall_material_flow": { "value": "wall_material_flow" },
         "bridge_wall_speed": { "value": "bridge_skin_speed" },
+        "cool_during_extruder_switch": { "value": "'all_fans'" },
         "cool_fan_speed_0": { "value": "cool_fan_speed_min" },
         "cool_fan_speed_max": { "value": "100" },
         "cool_min_layer_time": { "value": 6 },