Add support for right click (or in general other buttons)

[mvanassche]

Describe the feature you'd like:

Extend the clicker with button options to allow, for instance right clicks.

Suggested implementation:

Maybe extend click types to click-button-2 or rightclick ?

Describe alternatives you've considered:

Workaround: create a custom gremlin.

[mvanassche]

While the feature request might still makes sense in general,
using contextmenu as click type was actually what I was looking for.

So, contextmenu fulfills my need.