User missed the DWG underlays at Vault Viewing and Vault webclient Viewing.
Picture 1: At thumbnail the DWG underlay is visible
Picture 2: At Vault Vewer the DWG underlay is missing at Viewing
Why the difference? The DWF File "lost" / "ignore" the DWG underlay!
At Modell-Browser Button user can't visible the DWG underlay - "That's a shame"
