Validate slider value, when limits change
The value of slider changes in frontend, and readout, but not in python obj.
Sending data back to python object after slider values change
A comma after `this.touch`
adressed @jdfrederer's concern!
Removed alert statement!
Removed another stray alertO
added 'var'
Merge pull request #6171 from tarzzz/slider-value-validate

Validate slider value, when limits change