patches: Change icon for proxy-roled python script.

Spin is too much and waste cpu resource.

product/ERP5Type/patches/PythonScript.py

@@ -170,7 +170,7 @@ class _(PatchClass(PythonScript)):
     @property
     def zmi_icon(self):
       if self._proxy_roles:
-        return 'fa fa-terminal fa-spin'
+        return 'fa fa-terminal fa-flip-horizontal'
       else:
         return 'fa fa-terminal'