TTY and COLOR WHERE attribute

In version 1.3x, only some field types like EDIT or TEXTEDIT could support TTY attributes (COLOR, REVERSE), and the conditional COLOR WHERE attribute.

In version 2.0x, all type of fields now allow TTY attributes and the conditional COLOR WHERE attribute. So when using any ATTRIBUTE(<tty-attribute>) in programs, all fields will now be affected. For example, CHECKBOX and RADIOGROUP fields will now get a colored background, while in 1.3x it was not the case.