This commit deals with the fallout of the previous change by making tuples structs have public fields where necessary (now that the fields are private by default).
Closes #6738 Closes #7061 Closes #7899 Closes #9719 Closes #10028 Closes #10228 Closes #10401 Closes #11192 Closes #11508 Closes #11529 Closes #11873 Closes #11925