Smarter column width expansion for maximized windows

[audreytoskin]

I'm using yumex-dnf 4.3.2 on Fedora 25 Workstation x86_64, with GNOME Shell 3.22 (in an Xorg session), with a monitor resolution at 1920×1080. I normally launch and use it with the window maximized, but the columns don't adjust to take advantage of the available screen space. So the names and summaries of some packages gets cut off, unless or until I manually resize them. Column widths aren't preserved between sessions either.

[timlau]

The main problem is that it take much longer to fill the view with packages if the column resize mode is not fixed.
on my system it takes 2.75 s to populate 65k packages if columns are fixed size. if they are autorezize than it take more than 40s for adding the same number of packages to the view.
saving the current column with at exit could be a workaround, but will not resize automatic when then windows is maximized.