dired-subtree displays incorrectly when dired-hide-details-mode is on

[jojojames]

https://github.com/jojojames/dired-sidebar/issues/7

Example screenshot -> https://imgur.com/a/Ui5Zg

I added a workaround here to dired-sidebar (same workaround would work in plain old dired)

https://github.com/jojojames/dired-sidebar/commit/f4a00e9b213b0006b16692c57c1f570e2a9fbbf4

Small repro:

  /Users/james/Test:
  total used in directory 6 available 4289183273
  drwxr-xr-x  6 james staff  204 01-06 20:02 .
  drwxr-xr-x158 james staff 5372 01-06 20:02 ..
  drwxr-xr-x  2 james staff   68 01-06 20:02 Test1
  lrwxr-xr-x  1 james staff   23 01-06 20:02 Test1_Symlink -> /Users/james/Test/Test1

With that directory, turning on dired-hide-details-mode and then trying to toggle a subtree puts contents of the subtree on the same directory level. (Hard to explain but screenshot shows it).