Prevent autofocus of textarea in Chrome.

Chrome (tested in 31.0.1618.0 canary) automatically focuses a textarea once you retrieve it's cursor index. And as if that's not weird enough, in order to get Chrome to behave properly, I had to first `.blur()` the current textarea, and then `.focus()` the currently active element. Normally `.focus()` alone should suffice, but not here for some strange reason.

This is especially an issue when you have another input field on the page that makes use of the `autofocus` attribute, that field will receive focus initially, then immediately switch focus to the textarea that makes use of `autosize`.