[Processing] Fix behaviour of closeEvent in AlgorithmDialogBase

Otherwise finished signal is not emitted when dialog closes

Author: radosuav

python/plugins/processing/gui/AlgorithmDialogBase.py

@@ -112,6 +112,7 @@ def linkClicked(url):
 
     def closeEvent(self, evt):
         self.settings.setValue("/Processing/dialogBase", self.saveGeometry())
+        super(AlgorithmDialogBase, self).closeEvent(evt)
 
     def setMainWidget(self):
         self.tabWidget.widget(0).layout().addWidget(self.mainWidget)