Make improvements to SeleniumBase Visual Testing

Make improvements to SeleniumBase Visual Testing

• The self.check_window() method gets the check_domain arg.
  -- check_domain defaults to True.
  -- If check_domain is set to False, the domain check won't occur.
• Improvements were also made to the layout comparison outputs.

self.check_window(name="default", level=0, baseline=False, check_domain=True)

For the Visual Testing docs, see:
https://seleniumbase.io/examples/visual_testing/ReadMe/

For the Visual Testing YouTube video, see:
https://www.youtube.com/watch?v=erwkoiDeNzA

Other changes:

• Change default button colors for IntroJS Tours.
• Refresh Python dependencies:
  -- setuptools>=58.0.2;python_version>="3.6"
  -- matplotlib-inline==0.1.3;python_version>="3.7"