1) I'm defining the column width as a percentage, because that is one of the two possible methods to define the width (following your documentation). In addition, using percentages as column widths allows me to have a more responsive grid. Is that not ok?
2) No, I absolutely don't want to have a horizontal scrollbar. Before installing the latest grid npm package update, the mentioned problem has not been present.
3) I would like to have the old behaviour of grouping back, namely that the first column with which you can collapse and expand a group of the grouping is only very narrow and not as large as the column width of the grouping column (as shown in my screenshot in the initial post). I would like to have the first column as width as shown in the following screenshot (is that not normal, that the first column of the grouping is very small?):
Thanks.