Currently, there are two main annoying problems with columns widths in the
spreadsheet:
* The initial column width is often too small. This is especially noticeable
with the ID integer attribute.
* There is no way to change the column width.
This patch improves both of these aspects. The initial column width will now be
derived from the content of the spreadsheet. This initial width is then stored
in DNA to make it editable and to avoid having to recompute it on each redraw.
Furthermore, there is a new modal operator to change the width of a column.
Pull Request: https://projects.blender.org/blender/blender/pulls/138657
db7b5a480b