UI interactions in Fiddles in Scheduler / Scheduler Pro class docs are sluggish

[matsbryntse]

Noticable delay

Compare http://lh/bryntum-new/schedulerpro/docs/#SchedulerPro/view/SchedulerPro to https://www.bryntum.com/docs/scheduler-pro/#SchedulerPro/view/SchedulerPro

Drag an event, notice the delay in action starting, and general feeling to localhost.