Make the global run settings available per project in project mode and
thus remove the diagnostic config selection from the
selectable-files-dialog:
* Extract the classes RunSettings and RunSettingsWidget instead of
duplicating stuff.
* Ensure to pick up the old settings
* Add some convenience buttons/links in projects mode allowing to
restore the global settings, to open the global settings and to
navigate (back) to the analyzer mode.
Change-Id: I1b91b6f8e58a87a025774e4643c46e176b2a8885
Reviewed-by: Cristian Adam <cristian.adam@qt.io>
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@qt.io>
