increasing number of digits beyond what is visible should enlarge columns automatically

[gdementen]

if one increase the number of digits it is safe to assume he wants to see them :)

[gdementen]

One question is whether we want to shrink columns automatically (up to a point?) when lowering the number of digits. I guess it would be a good idea too.

[gdementen]

moved to larray-project/larray-editor#145