Refactor methods and other updates

Refactor methods and other updates

• Refactor BaseCase methods to reduce code:
  -- Duplicate code was pulled into one method.
• Update JS methods that type backspaces:
  -- Use Keys.BACK_SPACE instead of "\b"
• Optimize wait_for_ready_state_complete():
  -- Shorten timeout and don't raise exceptions.
  -- ("interactive" state is often good enough)
• Refactor imports for exception-handling:
  -- Import from: "selenium.common.exceptions"
  -- Previously, exceptions were imported from:
  -- "selenium.webdriver.remote.errorhandler"
  -- (Now the exception imports are consistent.)
• Update Python dependencies:
  -- ipython==7.22.0;python_version>="3.7"
  -- rich==10.0.0;python_version>="3.6"