fix(select): force visual update in IE

IE9, IE10 and IE11 would always show the first <option> as
selected when the user moves from a null <option>
to a non-null one in a non-null <select>.
Even though the model was being updated correctly,
visually, the first <option> always appeared selected.

Setting the `selected` property twice in a row
seems to fix it in all the three versions mentioned above.

Closes #7692

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I doubt we can actually write tests for this, since it's only visual