I've set all column widths to "auto" and added a max setting of "fill" to the "name" column (in leftmost position). This works as expected and very long filenames are partially hidden.
I've got a command Set AUTOSIZECOLUMNS=col:name,override to make the complete filenames visible, moving everything else to the right. This doesn't work.
BUT
If I first manually change the name column's width by a few pixels (in either direction) and then use the above command, it suddenly works as expected.