would also be nice for uses of the code editor and not the visual editor. Perhaps it could be accessed from activation screen where the pages are listed since it is a page level and not a variation thing?

Suggestion: a way to remove the conditional activation trigger from within the visual editor without going into the page activation (auto-generated) callback and adjusting/removing it there?

Currently this option does not exist in the Visual Editor, but would be useful if you want to undo conditional activation (easily).