'self' not defined in DataFrameView.update_section_height()

[jitseniesen]

@andfoy I think you may need to add self here: https://github.com/spyder-ide/spyder/blob/master/spyder/widgets/variableexplorer/dataframeeditor.py#L486

It would be good to test the resize functionality afterwards to make sure it works :)

[ccordoba12]

@andfoy, please work on @jitseniesen's suggestions :-)

[andfoy]

Such a simple mistake! Sorry! Now it should be corrected in PR #3852, also I've tested it and it works like a charm :)