[2.0.x] Ender-4 small improvements in Configuration (#11843)

Marlin/src/config/examples/Creality/Ender-4/Configuration.h

 // User-specified version info of this build to display in [Pronterface, etc] terminal window during
 // startup. Implementation of an idea by Prof Braino to inform user that any changes made to this
 // build by the user have been successfully uploaded into firmware.
-#define STRING_CONFIG_H_AUTHOR "Skorpi, Creality Ender-4)" // Who made the changes.
+#define STRING_CONFIG_H_AUTHOR "(Skorpi, Creality Ender-4, brandstaetter)" // Who made the changes.
 #define SHOW_BOOTSCREEN
 #define STRING_SPLASH_LINE1 SHORT_BUILD_VERSION // will be shown during bootup in line 1
 #define STRING_SPLASH_LINE2 WEBSITE_URL         // will be shown during bootup in line 2

Marlin/src/config/examples/Creality/Ender-4/Configuration_adv.h

 /**
  * M355 Case Light on-off / brightness
  */
-//#define CASE_LIGHT_ENABLE
+#define CASE_LIGHT_ENABLE
 #if ENABLED(CASE_LIGHT_ENABLE)
-  //#define CASE_LIGHT_PIN 4                  // Override the default pin if needed
+  #define CASE_LIGHT_PIN ENDER4_FAN_PIN      // Override the default pin if needed
   #define INVERT_CASE_LIGHT false             // Set true if Case Light is ON when pin is LOW
-  #define CASE_LIGHT_DEFAULT_ON true          // Set default power-up state on
+  #define CASE_LIGHT_DEFAULT_ON false         // Set default power-up state on
   #define CASE_LIGHT_DEFAULT_BRIGHTNESS 105   // Set default power-up brightness (0-255, requires PWM pin)
-  //#define MENU_ITEM_CASE_LIGHT              // Add a Case Light option to the LCD main menu
+  #define MENU_ITEM_CASE_LIGHT                // Add a Case Light option to the LCD main menu
   //#define CASE_LIGHT_USE_NEOPIXEL           // Use Neopixel LED as case light, requires NEOPIXEL_LED.
   #if ENABLED(CASE_LIGHT_USE_NEOPIXEL)
     #define CASE_LIGHT_NEOPIXEL_COLOR { 255, 255, 255, 255 } // { Red, Green, Blue, White }

Marlin/src/pins/pins_RAMPS_ENDER_4.h

 #define BOARD_NAME "Ender-4"
 
 #include "pins_RAMPS.h"
+
+// The board only has one controllable fan connector, the others are just plain 12V connectors
+// in the default configuration, this is used to control the brightness of the LED band
+// hotend and controller fan are therefore always-on
+#define ENDER4_FAN_PIN RAMPS_D9_PIN
+#undef FAN_PIN