Add way for batch views to hide rows with given status code(s)

This seems like it would often be useful...though maybe belongs in the handler?

tailbone/views/batch/core.py

@@ -634,13 +634,19 @@ class BatchMasterView(MasterView):
         g.status_code.set(label="Status",
                           renderer=StatusRenderer(self.model_row_class.STATUS))
 
+
+    hide_row_status_codes = []
+
     def get_row_data(self, batch):
         """
         Generate the base data set for a rows grid.
         """
-        return self.Session.query(self.model_row_class)\
+        query = self.Session.query(self.model_row_class)\
                             .filter(self.model_row_class.batch == batch)\
                             .filter(self.model_row_class.removed == False)
+        if self.hide_row_status_codes:
+            query = query.filter(~self.model_row_class.status_code.in_(self.hide_row_status_codes))
+        return query
 
     def row_editable(self, row):
         """