Fix out of order event handling when calling operators from gizmos

Activating a gizmo used the windows eventstate which may have values
newer than the event used to activate the gizmo.

This meant transforms check for the key that activated transform
could be incorrect.

Support passing an event when calling operators to avoid this problem.

source/blender/python/intern/bpy_operator.c

@@ -313,7 +313,7 @@ static PyObject *pyop_call(PyObject *UNUSED(self), PyObject *args)
         return NULL;
       }
 
-      WM_operator_name_call(C, opname, WM_OP_EXEC_DEFAULT, NULL);
+      WM_operator_name_call(C, opname, WM_OP_EXEC_DEFAULT, NULL, NULL);
     }
 #endif
   }