Layout swapping not working if parent layout uses symbols

[pavel-krivanek]

Let's have a presenter with one button that, after clicking, swaps its layout ho contain two other buttons, And let's have a parent presenter containing two of such presenters.

so after clicking on the bottom one, the layout looks like this

Parent's layout is:

	^ SpBoxLayout newVertical
		add: #p1;
		add: #p2;
		yourself

Child layout is:

defaultLayout 

	| aLayout |
	
	aLayout := SpBoxLayout newHorizontal.

	collapsed 
		ifFalse: [ 
			aLayout add: #button1;
					  add: #button2]
		ifTrue: [ 
			aLayout add: #expandButton ].
		
	^ aLayout

When doing the same in Gtk, it fails with Instance of ByteSymbol did not understand #owner:

The swapping of a single child in a standalone window works well.

Code to reproduce

Install this: LayoutIssue.zip

LayoutIssuePresenterParent openGtk