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"Show Javadoc ALF+F1" function work correctly only when is focus on any element. But when I click to empty space "Show Javadoc" is also in context menu. I think that this is bug. Maybe will be useful, when this function show JavaDoc for current class.
I guess it is still there due to performance reasons. Anyway it is the editor action -> reassigning.
I don't think this actions is still in the context menu.