This is done for all top level windows - ports, stats, logs
At startup, the local portgroup would automatically become current with
the result that the welcome page would not be visible. Not sure why but
an explicit setFocus of ports window seems to avoid it.
The most time spent during apply is during packet rebuilding.
Unfortunately, there is no feedback from the drone to know the actual
progress, so this is just a busy indicator for now.
I tried to put a jump url to the FAQ on why it takes time, but 'coz the
app cursor is a "wait cursor", user cannot click on any widgets/elements
inside the dialog box - so this won't work.
Iterate on this dialog and what it displays based on user feedback.
Although the applyHint is also changed in this case, the applyHint is
visible only when the port is selected. Having the port name in a
different color is a visual hint to the user that Apply is pending
