CustomDialogRendererHandler: Disable SMBv1 dialog
This disables the overall SMBv1/SMBv2 dialog logic introduced by a5476b4f.
Indeed, due to a keystore issue the user will be asked/spammed everytime for a SMB version confirmation.
This SMBv1 dialog need a permanent keystore to remember the user choice. Sadly, we can't really add the keychain keystore until a major network browsing rework.
Some functionalities are missing like the ability to edit/remove keystore entries.