Refactors per Release

Turns out I have no idea which refactorings have landed in which releases, trying to create a table...

| component | hammer | ivanchuk | jansa/master | PR | | GTL | ? | ? | ? | ? | | Toolbars | ? | ? | ? | ? | | Tagging | ? | ? | ? | ? | | Expression Editor | ? | ? | ? | ? | | Menu | ? | ? | ? | ? |