Comment 13 for bug 830584

Why not just "if the latest version in the destination is not present in the source then ask for explicit confirmation (a checkbox) before overwriting it"? Yes, you'd get false positives with buildX versions but we can probably live with that if the alternative is mistakes. A "yes, I'm sure, please overwrite all of these changes" button which toggles all of the checkboxes when doing several syncs would make it less cumbersome.