Incorrect logic used to copy multiple resources across connections

[jng]

Consider 2 active connections that are laid out like so:

 - Connection A
   - Foo
     - Bar
 - Connection B
   - FolderA
     - Layers
       - Layer1,Layer2,...,LayerN

If we copy Layer1,Layer2,...,LayerN from Connection B into Library://Foo/Bar/ on Connection A, we get the following layout on Connection A:

 - Foo
   - Bar
     - FolderA
       - Layers
         - Layer1,Layer2,...,LayerN

When instead we should be getting this folder structure instead:

 - Foo
   - Bar
     - Layer1,Layer2,...,LayerN

Basically when multiple resources are copied, their parentage is being retained when they should actually be discarded.

[jng]

Fixed trunk (r7209) and 4.0.x (r7210)