Merge from fltk-origin changes,

[rageworx]

Check these commit,
rageworx/fltk-origin@9487eb1

[rageworx]

Continuously updating issue

• Merge changes up to 27/03/2023

[rageworx]

First merge completed in commit of a43f068..b24f7c4 .

[rageworx]

Testing

• ./configure OK.
• make OK.
• CMake for MSVC, Ok.

[rageworx]

New task : 12427da9b5619ada799ce018edc8af846486416f
rageworx/fltk-origin@12427da

[rageworx]

New pull request reached.
rageworx/fltk-origin#15

[rageworx]

Completed to PR #15.

[rageworx]

New task, rageworx/fltk-origin@76bbab2

[rageworx]

New task, rageworx/fltk-origin@c23506c