WiredSlicer documentation mention knobradius attribute that does not work

[titimoby]

I was trying to modify the radius of the knob on a slider and nothing happend.
As mentioned in the doc I used all attributes:

But whatever the value I give to knobradius, no visible changes in my app.
I looked at the code, and there seems to be no such attribute.

[pshihn]

i think the documentation may be old.

[pshihn]

But would be nice to add it back

[pshihn]

docs fixed