Table columns should retain their width when reordering

[njust]

Is your feature request related to a problem? Please describe.
As the width of the columns is currently cached by column index, the width of the column that was previously in the position is adopted when columns are rearranged.

Describe the solution you'd like
With a unique id per column, the current width could be cached by column id, which would help to retain the column width when reordering.