UsbDeviceWidget: Consider asynchronous redirection flows
UsbDeviceWidget: Consider asynchronous redirection flows

Gray out redirection controls while there are
asynchronous redirection flows in progress.

Signed-off-by: Kirill Moizik <230ffca79de7e6eb3a18fb9f93884325b7f69222@redhat.com>
Signed-off-by: Dmitry Fleytman <f50f56ffad4b379c2a89812e98b14900ef87e9ea@redhat.com>
Acked-by: Jonathon Jongsma <c7254805a17bd5c41e24c3a278fcbf3afcdfb0fa@redhat.com>

flexVDI/spice-gtk,SPICE/spice-gtk,fgouget/spice-gtk,fgouget/spice-gtk,flexVDI/spice-gtk,SPICE/spice-gtk,fgouget/spice-gtk,SPICE/spice-gtk,SPICE/spice-gtk