This is how I think it should be wide as minimum. Note however that I have buttons on the left, hence my suggestion of a dynamic minimum width. People who have them on the right shouldn't have unnecessary padding.
** Attachment added: "Screenshot-20190806135750-897x641.png" https://bugs.launchpad.net/ubuntu/+source/gnome-disk-utility/+bug/1839127/+attachment/5281188/+files/Screenshot-20190806135750-897x641.png -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-disk-utility in Ubuntu. https://bugs.launchpad.net/bugs/1839127 Title: headerbar buttons can get hidden if left column is too narrow To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-disk-utility/+bug/1839127/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs