DiffTool: removePropertyList function should be working same for both ERP5 object and dictionaries of ERP5 object properties

Before we use to neglect removing some properties from ERP5 object properties' dict, which led to error in case of use
of DiffTool for Historical Revisions dict. Thus, its important for removeProperties function to act similar in both
cases.

Also, add `base_data` in attribute_set to be removed because `data`, `base_data` and `text_content` are same