New-UDTransferList limited to 200px width!?

I am trying to use the New-UDTransferList in my dashboard but it doesn’t use the whole desktop-width it is limited by the css “.jss12” . Is this an error?

Universaldesktop 3.1.6 with the sample code from the docu:

New-UDDashboard -Title 'PowerShell Universal' -Content {
    New-UDTransferList -Item {
        New-UDTransferListItem -Name 'test1 with a very long text' -Value 1
        New-UDTransferListItem -Name 'test2 not as long' -Value 2
        New-UDTransferListItem -Name 'test3' -Value 3
        New-UDTransferListItem -Name 'test4' -Value 4
        New-UDTransferListItem -Name 'test5' -Value 5
    } -id "tl" -SelectedItem @('4', '1')

It does look like is hard coded into the control. I’ve opened a feature request to add some formatting features to the transfer list.