Run as administrator and sudo are different

When run from terminal the sidebar shows the current user's bookmarks but when run from Plank the sidebar shows only Home and Rubbish bookmarks. Not sure whether this is a problem with Files or Plank but I do not think it should be like this.

On investigation, the cause of this is that Files is launched from Plank using "pkexec" which resets the environment, not sudo. Unfortunately FIles crashes after the authentication dialog if this is simply changed to gksudo --preserve-env

The simplest fix to this would be to show the root bookmarks in both cases.

The simplest method is always not the best one, I think that the users' bookmarks should be displayed in both cases, IF there is only one user.
If there are multiple accounts, maybe then only show the bookmarks of the root.

Launching apps with gksudo is deprecated. Running the app complete as root (sudo) is not recommended as it is not as safe as pkexec.

Policykit (pkexec) is the recommended method for escalating privileges. From the pkexec docs "The environment that PROGRAM will run it, will be set to a minimal known and safe environment in order to avoid injecting code through LD_LIBRARY_PATH or similar mechanisms. In addition the PKEXEC_UID environment variable is set to the user id of the process invoking pkexec"