Data table: Select full rows results in an error

[VesnaT]

What's wrong?

On Data Table widget, clicking upon Select full rows results in an error:

Traceback (most recent call last):
  File "/Users/vesna/orange-widget-base/orangewidget/gui.py", line 1971, in __call__
    self.func(**kwds)
  File "/Users/vesna/orange3/Orange/widgets/data/owtable.py", line 622, in _on_select_rows_changed
    for slot in self._inputs.values():
AttributeError: 'list' object has no attribute 'values'

How can we reproduce the problem?

File -> Data Table (Click Select full rows in control area)

What's your environment?

• Operating system: macOS Catalina
• Orange version: master
• How you installed Orange: pip

[markotoplak]

Thanks! Looks like a regression of #4860