Not only logging errors also throwing them

[QA-ler]

While I started using wdi5, I faced the problem that wdi5 seems to only log errors in every error case (it just creates red console logs), but never raises errors.

For example, when I want to wait for an element or element property to have a certain property.
In my case, I do it in a browser.waitUntil() function. Every time the function is executed, I get this red console log, which is to be expected though, as it can take some time for the property to be set correctly.
Now I can only do two things:

1. Set all logging for elements to false, which would also prevent logs when an error occurs that I don't expect. (E.g. I used an invalid selector which does not refer to a ui5 control).
2. set wdi5 logs to silent in general.

In this case, if wdi5 would throw errors, I could catch them and decide in my own code if I want to throw something or not. Or even do additional logging.

Whether these errors should also be output when logging is disabled by selector, I have no preferenz to.