Add Folder Sync Connection sometimes does not warn

[jnweiger]

The GUI has a prominent button Add Folder Sync Connection (that should never be used IMHO).

If the user adds a second Folder Sync Connection, he normally gets a warning,

This warning is good, as there is no option to replace the '/' connection with another one. So every second connection is an overlap.
After accepting the warning, the connection is created, and the selected subfolder is synced outside of the main tree again.

The user can now delete the original Folder Sync Connection

... and recreate a sync connection for the parent folder:

This time, it is again an overlap, but no narning is shown.
The warning should be shown in both cases.

[TheOneRing]

The issue is part of the changelog and will be tested in the qa process, reopen if the issue was not fixed.

[jnweiger]

confirmed fixed in 2.7.0 rc3

The expected Warning: You are already syncing /Photos/, which is a subfolder of /. is shown.