Add definition for HDMI 720*480 60hz
Add support for RadioButton
Add support for TabGroup

This allow developer to use a window like tab group. This is a
rudimentary tab group for now.
Copy screen now will be done with edma3
Move from predefined default font to defined font
Add definition of USE_ALL_FONTS

This is defined on controllers with large memory and undefined on
controllers with small memory and the developer don't use all fonts.
delete extern font declarations
Optimize print_string function.
Optimize to work inside a window and tab group.
Declare fonts with extern, add usage definition.
Add string variable definition.
Fix missing source string after call "str_copy".
Add some modes:

Add hide V scrollbar and H scrollbar.
Add hide window header ( this allow to put multiple secondary windows on
same screen like status bar, virtual keyboard).
Add virtual qwerty keyboard children.
Add declarations for private and public items on window and tab group.