Revert "Web UI: Remove offline version of Web UI"
    
    This reverts commit 24525fd086450616d4edd2aaf26dec868ff80ea9.
    The reverted commit removed symlinks which allowed unit tests to
    access FreeIPA code.
    
    https://pagure.io/freeipa/issues/6447
    
    Reviewed-By: Petr Vobornik <pvoborni@redhat.com>