update/resize LayoutContainer

If I update the content of one of my contentPanes, I need to get the whole layout to resize itself and shrink another Pane to make the new content visible.  I tried calling checkSize() on the LayoutContainer but that didn't help.  Resizing the window (maually or with JS) does fix the layout.  How can I call this resize event without changing the window size?

I've noticed that the originally-messed-up layout in Safari with RichText component(s) in contentPanes fixes itself on a window resize too - so that bug can probably be fixed with a timeout(checkSize,1) call in the initialization somewhere.
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