Fixed being unable to find the 'update status' box.
Now selects a 'do you know' notification rather than the latest,
as this is now a link on how to upgrade the app which opens in
external browser.
This changeset adds the ability to sleep on the device via a
device.sleep() method. This invokes sleep on the target device. This
is useful for situations where the passage of time on the target
device does not match that of the host, e.g., gem5.
This changeset also updates a number of workloads to use this new
sleep method.
