New click-type: short-long-click

[mbbert]

Hi Lennart!

I'm using your library to control the lights in my rooms.

The long-click is used to set the brightness.
I'd need another long-click type to control also the color temperature.

I'd like to suggest a short-long-click type.

A short click followed by a long button press should call a short-long-click detected handler call-back.
When the buttons gets release, a short-long-click handler call-back should be called.

Thank you
Best regards
Norbert