Simplify method calls by using by="css selector" instead of by=By.CSS_SELECTOR

[mdmintz]

Simplify method calls by using by="css selector" instead of by=By.CSS_SELECTOR.

...because if you ever want to change it, (not that you'd need to since there's auto-detection between CSS and XPath), then you would need an extra import in your tests unless you know the values of the by constants:
from selenium.webdriver.common.by import By