Add function to check that element is in the viewport/ rework .untilIsVisible

[Kirils-Podgalskis]

.untilIsVisible throws "true" regardless whether element is actually visible inside a Viewport

[alvarolaserna]

The method is not meant to return any value, maybe you are thinking of

.isVisible()

?

The untilIsVisible() is just an assert and will either pass or fail, raising an error

[Kirils-Podgalskis]

I mean, yes, it passes regardless whether element is actually visible inside a Viewport

[alvarolaserna]

the way it works is if the element is visible within the page, even when you have to scroll down/up to get it into view. it will through false if the element is hiden. For example, when you go to google.com and you press on the input to check suggestions, there is an element that is about feedback on suggestions. This element will through false if you have not opened the suggestions dropdown.