🚸 Update Marlin Mode defaults

[thisiskeithb]

Description

• White text is a better default than orange. This also matches the current defaults in Configuration.h:

  BIGTREETECH-TouchScreenFirmware/TFT/src/User/Configuration.h

  Lines 407 to 411 in 87b6fb3

  	* Options: [ WHITE: 0, BLACK: 1, RED: 2, GREEN: 3, BLUE: 4, CYAN: 5, MAGENTA: 6, YELLOW: 7,
  	* ORANGE: 8, PURPLE: 9, LIME: 10, BROWN: 11, DARKBLUE: 12, DARKGREEN: 13, GRAY: 14, DARKGRAY: 15]
  	*/
  	#define MARLIN_BACKGROUND_COLOR 1 // Marlin Mode background color (Default: 1)
  	#define MARLIN_FONT_COLOR 0 // Marlin Mode font color (Default: 0)

• Disable title text by default. You should already know that you're in "Marlin Mode" based on the lack of Touch Mode UI.

Benefits

Better Marlin Mode defaults