[all variants] MATE - can minimum width of Caja side pane be changed?

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http://ubuntuforums.org – In Nautilus with GNOME 2, with the side pane open a maximised window typically had eight columns of icons. However, a lot of my folders only show seven columns with a large amount of empty space to the right. I'm pretty sure the minimum side-pane width is a little larger in Caja than it was in Gnome 2's final version of Nautilus, and that this is a contributing factor, but can't find a way to do anything about it. (Hardware)