Fix: Custom root folders are just added to existing root folders when set.

[KevinJump]

When you have arrays in the appsettings they are cumulative (so they add to the default values).

This fix.

• Makes the 'default' value be an empty array.
• Uses post configure to add the default values to the array if its empty.

so.

"uSync": {
  "Settings": {
    "Folders":  ["uSync/main", "uSync/Site"],
  }
}

will now only set two folders not four.

[KevinJump]

#587