[dbmanager] followup 8727799: again some emit signal fix

Author: slarosa

python/plugins/db_manager/db_plugins/oracle/plugin.py

@@ -527,7 +527,7 @@ def type2String(self):
 
     def update(self, new_name, new_type_str=None, new_not_null=None,
                new_default_str=None):
-        self.table().aboutToChange()
+        self.table().aboutToChange.emit()
         if self.name == new_name:
             new_name = None
         if self.type2String() == new_type_str:

python/plugins/db_manager/db_plugins/postgis/plugin.py

@@ -184,7 +184,7 @@ def runVacuumAnalyze(self):
         self.schema().refresh() if self.schema() else self.database().refresh()
 
     def runRefreshMaterializedView(self):
-        self.aboutToChange()
+        self.aboutToChange.emit()
         self.database().connector.runRefreshMaterializedView((self.schemaName(), self.name))
         # TODO: change only this item, not re-create all the tables in the schema/database
         self.schema().refresh() if self.schema() else self.database().refresh()