Add context for uno controls

source/easymacro2.py

@@ -3232,6 +3232,12 @@ class UnoBaseObject(object):
         else:
             super().__setattr__(name, value)
 
+    def __enter__(self):
+        return self
+
+    def __exit__(self, exc_type, exc_value, traceback):
+        pass
+
     @property
     def obj(self):
         return self._obj