Guys, I think it's time to retire the old property...

# tornadofx

[edvin]

Guys, I think it's time to retire the old property syntax, at least from examples. We can leave it in the framework and not even deprecate it for now, but I think we should remove all examples in the guide that use the old syntax. It's just ugly and cumbersome compared to the new syntax.

[nimakro]

@edvin I think we should even deprecate them so new users get a hint right away that the should not use them