Drag and drop: wrong className property for guideBox

[raf18seb]

Expected behaviour

When dragging, the guideBox CSS styles should be applied.

Actual behaviour

Styles are not applied because in the code the "className" property is not valid (it should be "class").

Live demo with steps to reproduce

https://jsfiddle.net/BlackLabel/ow2vta9c/

Workaround

Change the "className" property to "class": https://jsfiddle.net/BlackLabel/2h75za6m/

Product version

Highcharts 10.3.3