Partial fix for selecting SELECT elements

[ramiroaraujo]

This issue has been reported and verified in #2257 and #2287, and was introduced with Chrome v53.
It's been noted in #2257 that calling focus() on the select element could do the trick, and indeed it does. It doesn't expand the select as it used to be, but at least it's focused.

The fix treats the select elements the same as input elements, and simply focus on them.
I've also updated the test to verify the focus on the element.

I've been using this fix for a few days now, since I couldn't go by without hitting selects any more. Hope it helps!

[gdh1995]

+1

Some ideas:

• I think we may also focus <embed>s and <object>s.
• It seems that clickEl.type not in ["button", "submit"] is not needed, because else if DomUtils.isSelectable clickEl in Line 390 has checked the same thing.

[ramiroaraujo]

@gdh1995 I would prefer to keep this PR as simple as possible, "focusing" solely on the <select> issue

[smblott-github]

That's really nice, @ramiroaraujo, thanks.

(And sorry for the delay.)

[AndrewSouthpaw]

Any chance we could get a version bump on the Chrome extensions store, so we can all more easily benefit from this partial fix? :)

[vmindru]

+1 need a version bump