Thumb layout arrow keys need longer press

The arrow keys on thumb layout are very handy but also a pain, at least for me.

They are very easy to hit while typing & in particular end up, in-text a line above where you expect. The arrows needs (or an option) to have a longer than normal press to trigger, at least for the first press. So if you need to arrow somewhere you need to press a little longer than normal typing - but if using arrows repeatedly it's only the first arrow press that needs to be longer.