add 'no file transfers in progress' header if there are no file transfers
add 'no file transfers in progress' header if there are no file
transfers

NebulousLabs/Sia-UI,NebulousLabs/New-Sia-UI,NebulousLabs/New-Sia-UI,NebulousLabs/Sia-UI,NebulousLabs/Sia-UI,NebulousLabs/New-Sia-UI