Add option to profile scans

- Add preference for profiling scans
- Move debug options to tab in preferences
- Add label with clickable link to debug output (appdata) to debug tab in preferences
- Update translation source files

qt/directories_dialog.py

@@ -356,7 +356,7 @@ class DirectoriesDialog(QMainWindow):
             msg = tr("You have unsaved results, do you really want to continue?")
             if not self.app.confirm(title, msg):
                 return
-        self.app.model.start_scanning()
+        self.app.model.start_scanning(self.app.prefs.profile_scan)
 
     def scanTypeChanged(self, index):
         scan_options = self.app.model.SCANNER_CLASS.get_scan_options()