Right now it's hidden somewhere in the mess that is the "organically grown" config UI. I think it would fit better in a separate node or tab, maybe adding a new category similarly to the "Advanced options" might be suitable. If so, creating that and moving the TSM (as well as potentially other settings) around to reorganize the config UI would warrant a separate issue.

While I'm at it, might as well grey out the setting and show the current setting still, instead of hiding the checkbox altogether. That seems more in line with an intuitive user experience, IMHO.