Un-tied up "implicitWait" to "waitForPageLoadToStart".

Was not a good idea.
Reduced flakiness of "element finding" tests.
Ignore page load failures initiated by Click action.

If the click finishes, it's finished.
The fact that the expected destination page didn't load it's irrelevant.

This implies that, in case a "onLoadFinished" occurred
but resulting "status === 'fail'" we have to ignore it.

This is how Chrome and Firefox Drivers seem to behave…

Fixes #202.