`--demo` and `--slow` modes should add a pause when entering text that ends with `"\n"`

[mdmintz]

--demo and --slow modes should add a pause when entering text that ends with "\n"

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Example: If the entered text is "Password\n", then there should be a brief pause between the "Password" and the "\n" when using --demo mode or --slow mode.

Note: If entering text that ends with "\n", this causes SeleniumBase to call a Selenium submit() action on that selector after the text is entered. Also, if not running in --demo or --slow modes, then it may make sense to add a really tiny pause anyway (Eg. 0.01 seconds, or similar). At least then, the human eye has a chance of seeing that text was entered, because if a submit() action takes the user to a different page, that may make the user think that no text was ever entered.

[mdmintz]

This was resolved in 4.23.4 - https://github.com/seleniumbase/SeleniumBase/releases/tag/v4.23.4