jqxSwitchButton: Off label disappears on browser zoom in or out

[Svetoslavsb]

Describe the bug
Zooming in and out in the browser causes the off label of the switch button to disappear

To Reproduce
Steps to reproduce the behavior:

1. Go to https://jsfiddle.net/mogador/ovtb7jfd/
2. Zoom out to 90%
3. See error