Perform optimizations on "select_option_by_*()" methods

[mdmintz]

Perform optimizations on select_option_by_*() methods.

These methods include:

self.select_option_by_text(dropdown_selector, option, dropdown_by="css selector")

self.select_option_by_index(dropdown_selector, option, dropdown_by="css selector")

self.select_option_by_value(dropdown_selector, option, dropdown_by="css selector")

I found some fancy edge cases where the current behavior can be improved upon.