Sync: Handle case when git is unmanaged, but dot is still managed

[Timoses]

463600b#diff-064c10df0b9143aaf638ec8f14cff24aR271

                // TODO: else if git not managed, but dot is still managed?
                //       This might happen when on another machine a file is unmanaged (removed).
                //       Another machine starts up and sees an unmanaged gitfile, but dotfile is
                //       still managed ...
                //       BEWARE: Sync.4 -> Have to create something like 'unmanageDots' container... for sync.4
                //                or Sync.5 ???