[Suggestion] Extended Assign (Expression) Editor

Another thing that could be introduced is a Extended Assign (Expression) Editor. When using the Assign Action, we can have, for instance, 30 assigns. Editing them in a property grid like editor may not always be the best(practical) solution. It would be nice to have a Extended Expression Editor for object that had multiple arguments. This Extended Expression Editor would have on the left side a treeview with all the arguments of that action.