Analyzer: Cleanup settings handling

More flexible, less over-engineered this way.

Change-Id: I3e224a6be85d3a187056d79fd506e8cf6a32c8a9
Reviewed-by: Daniel Teske <daniel.teske@digia.com>

src/plugins/valgrind/suppressiondialog.cpp

@@ -222,7 +222,7 @@ void SuppressionDialog::accept()
         }
     }
 
-    m_settings->subConfig<ValgrindBaseSettings>()->addSuppressionFiles(QStringList(path));
+    m_settings->addSuppressionFiles(QStringList(path));
 
     QModelIndexList indices = m_view->selectionModel()->selectedRows();
     qSort(indices.begin(), indices.end(), sortIndizesReverse);