Nice to have
In selection dialogs that allow selecting the value for list-valued references, clicking the checkbox in the table header does not activate the checkbox, but the popup for the sort functionality.
If you drag the selection column larger, the selection works, but looks only moderately nice:
The column was not adjusted to the size of the new sort buttons at that time. It is a bit too small and as a result the sort button overlaps the checkbox. The width of the sort button as well as that of the column have been adjusted so that nothing can overlap anymore.
In the Technical Demo under Forms open the dialog of selectionControlTableMulti. There click the checkbox (especially on the right side of the checkbox that overlapped with the icon).