Disabling multiSort feature not working

[kronaemmanuel]

Issue is also reproducible on Basic example

Forum post

Hello Bryntum teams!

We have found what we think it's a bug related to the multiSort feature, that we managed to replicate in your live examples.

The issue is really simple, having a grid with the multiSort functionality disabled, we can still sort by multiple columns by clicking on their headers while pressing the command key (macOS).

Thanks in advance for your help!