Howto save column widths in relationship window?

[Asperamanca]

I often switch between showing and hiding the relationship window - it is very useful sometimes, but takes away prime real estate from my diagrams.

The first thing I always have to do is to adjust the column widths for the source and target names, so I can actually read them. It's not a big deal, with a double click on the column ends.
Still, do that 20 times a day, and things add up. Is there a way to save the column width, or to have the columns auto-size to fit the content?