fix: the source views for constraints and indexes are now cleared when the

model is reset as this will clear all selections.

Unfortunatly the selection model does not trigger a selectionChanged when
the model is reset.

Close #16

pglab/MainWindow.cpp

@@ -321,7 +321,7 @@ void MainWindow::addPage(PlgPage* page, QString caption)
 	//addToolBarButtonsForPage(page);
 }
 
-void MainWindow::removePage(PlgPage *page)
+void MainWindow::removePage(PlgPage *)
 {
 
 }