***Note from Migration:***
Original Title was: Adding a right-click "Replace by AttributeManager" on transformers when revelant
I would like a "Replace by AttributeManager" option when I right-click on an AttributeKeeper or an AttributeRemover or a StringConcatenator, etc.
And the cherry on the cake, be able to replace a selection of multiple connected revelant transformers by one AttributeManager (like a "Replace all selected Transformers by AttributeManager" option).
