Top printer not properly selected.

We keep track of historically used printers and when the print dialog
is opened we load them. We were selecting the first printer before the
historical ones are loaded which led to a case where the PDF printer
is selected and then a better printer appears but we have the PDF one
selected.

Also we were asking the printer spinner for the current printer but
if the data set of the adapter changes and we ask the spinner for the
selection we get a wrong answer because the adapter and the view are
off sync since the view is updated on the next message.

Change-Id: I0c12d2d3b19227a8f6af6e421b92013ec06cc021