Slider value display - customisation

[d.healey]

@SteveRiggs You can only have one callback for a control so you have to make sure all the action you need happens in one of those callbacks you've declared already and delete the other one.

[SteveRiggs]

@d-healey Thanks mate. Just moved it down and it's working now. Saved the day yet again. Nice one. I'm gonna have to start crediting you on my plugins at this rate