Complete M200 output with M503

- The contents of EEPROM include filament diameters even with
Volumetric disabled. This change makes `M503` display the full
volumetric settings so that playing back the output of `M503 S0` will
fully restore them.

Marlin/configuration_store.cpp

@@ -826,16 +826,21 @@ void Config_PrintSettings(bool forReplay) {
 
   #endif // FWRETRACT
 
-  if (volumetric_enabled) {
+  /**
+   * Volumetric extrusion M200
+   */
   if (!forReplay) {
     CONFIG_ECHO_START;
-      SERIAL_ECHOLNPGM("Filament settings:");
+    SERIAL_ECHOPGM("Filament settings:");
+    if (volumetric_enabled)
+      SERIAL_EOL;
+    else
+      SERIAL_ECHOLNPGM(" Disabled");
   }
 
   CONFIG_ECHO_START;
   SERIAL_ECHOPAIR("  M200 D", filament_size[0]);
   SERIAL_EOL;
-
   #if EXTRUDERS > 1
     CONFIG_ECHO_START;
     SERIAL_ECHOPAIR("  M200 T1 D", filament_size[1]);
@@ -852,13 +857,14 @@ void Config_PrintSettings(bool forReplay) {
     #endif
   #endif
 
-  } else {
+  if (!volumetric_enabled) {
-    if (!forReplay) {
     CONFIG_ECHO_START;
-      SERIAL_ECHOLNPGM("Filament settings: Disabled");
+    SERIAL_ECHOLNPGM("  M200 D0");
-    }
   }
 
+  /**
+   * Auto Bed Leveling
+   */
   #ifdef ENABLE_AUTO_BED_LEVELING
     #ifdef CUSTOM_M_CODES
       if (!forReplay) {