Iceberg repositories table column headers move when window is clicked

[Rinzwind]

As demonstrated in the following video, the table column headers in an Iceberg repositories window move when the window is clicked. The Playground snippet used in the video shows the position of the first column’s header (‘Repositories’) on the transcript. The position is [email protected] initially, then changes three times as the window is clicked. At the last click, the rows in the table can be seen to move as well. Earlier similar issues are issue #16389 and issue #17384.

Demo.Repositories.Table.Column.Headers.Moving.mp4

[Rinzwind]

The snippet used in the video:

[
	(Delay forSeconds: 5) wait.
	100 timesRepeat: [
		SystemWindow topWindow allMorphs
			detect: [ :morph | morph class = StringMorph and: [ morph contents = 'Repositories' ] ]
			ifFound: [ :morph |
				(position := morph position) = previousPosition ifFalse: [
					Transcript show: (previousPosition := position); cr ] ].
		(Delay forSeconds: 1) wait ] ] fork