I found the setting at `Devices` > `Configuration Profiles` >
`Restrictions` > `Functionality` > `Auto-correction`. There it might
also make sense to disable `Predictive Keyboard` and `Spell-check`.
When you reload the page, there is a short moment when the headers still
show up. You need to be very quick to click on another column header
like Serial Number. This will disable sorting by the extension attribute
and the table will show again.