In 2.0 when you choose <Make unclosable> from the SystemWindow menu
(downward-pointing triangle in the top right of each window), the next
invocation of that menu would instead have the opposite function <Make
closable>.
In 3.0 it does not change to <Make closable> so you cannot revert the
feature. I have isolated this to PragmaMenuBuilder's ivar 'itemList'
being cached, and describe a a fix at
https://pharo.fogbugz.com/default.asp?11835
However I am not comfortable with my awareness of the architectural
implications and so I seek a wider discussion of this. Two queries leap
to mind:
1. What is the philosophy behind caching the pragma-menus? To what
degree did menu performance suffer in practice?
2. What consideration has been given to dynamic elements in other
pragma-menus?
3. Suggestions for alternative resolution paths to follow?
cheers -ben