Tighten up bottom pop-up search box - label, alignment, reverse order

[George]

- Since you're more likely to read from the bottom up, we should reverse the order of fields in the bottom search pop-up.
- The main search field also needs a label: "Keyword"
- The text fields aren't aligned - they're a few pixels out on the top pop-up too.

[George (george-archive)]

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[George (george-archive)]

Need to tweak when the page scrolls as you click "Options" - it's a bit too jumpy atm. Only need to scroll down if there isn't enough room at the top of the page to for the search pop-up to show in full. (IE, if the top of the popup would be obscured by the top of the browser window.)