Multi-column lists are supposed to collapse to single-column when they
are estimated to be wider than the available window width. However,
current code has two errors. First the calculation of the maximum
number of possible rows is based on entire screen height when the most
available is a bit less than half. This too-large value was used in
the calculation of widths, yet the maximum rows is actually clamped
to about 24 for uncategorized lists. Whenever the former is greater
than the latter this could cause collapsing to not occur. This issue is
only really noticeable for lists in Nodes as these can be shown much
smaller than regular size. This PR fixes the max-row calculation and
uses this correctly when breaking lists without categories.
Pull Request: https://projects.blender.org/blender/blender/pulls/132881
fe071cd076