Modification to display text and added character

[SupremeSports]

• Modifications to allow lower and uppercase character in the same string (e.g: HEllo instead of HELLO or hEllo)
  • If lowercase character doesn't exist, upper case is used (e.g.: hEllo)
  • If user sets ForceUppercase(true), it would give HELLO
• Modifications to letters bit assignment for better display
• Added underscore "_" to list
• Aligned indentations that was offset

TESTED and working on real life display