"Save detailed report" button should give feedback to the user

[Ara Pulido]

When you have finished the run, in the test results page, you can click on "Save detailed report", but the user doesn't get any feedback about:

1) Did the saving went well?
2) Where can I find the report?

After clicking on the save detailed report the user should get a dialog informing them that the action went well and where to find the report.

[Sylvain Pineau (sylvain-pineau)]

I don't think the url dispatcher understands URI starting with file:// but we should definitely use it + Qt.openUrlExternally(uri) in QML

[Maciej Kisielewski (kissiel)]

Reopening because app doesn't give any feedback _WHILE_ it's saving the report.

Here's feedback from Julia:
>>>
 I tried the "Save detailed report" button but it wouldn't do anything (it looked like pressed, thou). Is this supposed to save the report on the device to make it accessible other way? (Maybe pull the file from the computer?) Maybe the feature of being able to send it through email (if bq support asks the customer to do it) could be a nice feature (screenshot attached).
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