[VC] Searchable functions list

[siegmund]

Hey Massimo,

I have the feeling that you've already addressed this one, but I was not able to recall where to look for.
When adding functions to vc-widgets (button, speed dial, ...) it would be great to have a search function so one can quickly find the function that should be assigned to the widget. This is especially helpful, if you have a large number of functions.

Lukas