Two minor enhancements to checked() and selected()

[johnbillion]

The helper functions checked() and selected() compare two passed parameters and echo out their respective markup based on the result of the comparison.

Two improvements would be to give the second parameter a default value of true and to add an echo parameter, also with default value of true.

[johnbillion]

Patch

[johnbillion]

Patchy

[westi]

(In [10662]) Enhance checked and selected as well as consolidating code. See #9032 props johnbillion for the idea.

[westi]

Now we need a mega patch to rid ourselves of calling with true as the second argument ;-)

[filosofo]

Replying to westi:

Now we need a mega patch to rid ourselves of calling with true as the second argument ;-)

There you go, thanks to sed. Not too mega, either.

[westi]

(In [10670]) Don't pass defaulted argument to checked(). Fixes #9032 props filosofo.