Github user tbouron commented on the issue:
https://github.com/apache/brooklyn-ui/pull/84
@ahgittin This PR does change the behaviour for the `catalog-selector`, it
was already doing this before my change. Agree it's not optimal but it get
really complicated to check for the actual space available in Javascript,
because it depends of the actual screen size, as well as each item size
(defined in CSS)
You didn't see this before because the palette was built with multiple
accordions, making it bigger than the screen height in almost every occasion
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