Tree menu dropdown not show in SAO 8.0

In the release 8.0 the icon to select the visibility of optional columns of a tree view does not show the the options.

The problem seems to be related to the CSS code:

.treeview > table.tree > thead > tr > th > div {
  display: flex;
  overflow: hidden;
}

Removing the property

overflow: hidden;

solves the problem.

The forum is not the bug tracker:

Ref: Tree menu dropdown not shown in SAO 8.0 (#14793) · Issues · Tryton / Tryton · GitLab