[processing] Correctly reset progress bar after completing batch execution

Author: nyalldawson

python/plugins/processing/gui/BatchAlgorithmDialog.py

@@ -187,6 +187,7 @@ def finish(self, algorithm_results):
 
         self.createSummaryTable(algorithm_results)
         self.mainWidget().setEnabled(True)
+        self.resetGui()
 
     def loadHTMLResults(self, results, num):
         for out in self.algorithm().outputDefinitions():