Make initial layer print temperature dependent on actual printing temperature

Otherwise when you change the print temperatures the initial print temperature doesn't change along.

Contributes to issue CURA-3433.

resources/quality/ultimaker3/um3_aa0.4_TPU_Draft_Print.inst.cfg

@@ -24,7 +24,7 @@ material_final_print_temperature = =material_print_temperature - 10
 material_flow = 106
 material_initial_print_temperature = =material_print_temperature - 5
 material_print_temperature = =default_material_print_temperature + 2
-material_print_temperature_layer_0 = =default_material_print_temperature + 2
+material_print_temperature_layer_0 = =material_print_temperature
 retraction_count_max = 12
 retraction_extra_prime_amount = 0.8
 skin_overlap = 15

resources/quality/ultimaker3/um3_aa0.4_TPU_Fast_Print.inst.cfg

@@ -24,7 +24,7 @@ material_final_print_temperature = =material_print_temperature - 10
 material_flow = 106
 material_initial_print_temperature = =material_print_temperature - 5
 material_print_temperature = =default_material_print_temperature + 2
-material_print_temperature_layer_0 = =default_material_print_temperature + 2
+material_print_temperature_layer_0 = =material_print_temperature
 retraction_amount = 7
 retraction_count_max = 12
 retraction_extra_prime_amount = 0.8

resources/quality/ultimaker3/um3_aa0.4_TPU_Normal_Quality.inst.cfg

@@ -23,7 +23,7 @@ material_final_print_temperature = =material_print_temperature - 10
 material_flow = 106
 material_initial_print_temperature = =material_print_temperature - 10
 material_print_temperature = =default_material_print_temperature
-material_print_temperature_layer_0 = =default_material_print_temperature
+material_print_temperature_layer_0 = =material_print_temperature
 retraction_count_max = 12
 retraction_extra_prime_amount = 0.8
 skin_overlap = 15