3604 Update dropdown plugin

[sarken]

http://code.google.com/p/otwarchive/issues/detail?id=3604

[coveralls]

Coverage decreased (-7.25%) when pulling f87475d on sarken:issue_3604 into 5edc92a on otwcode:master.

[coveralls]

Coverage remained the same when pulling b7776c2 on sarken:issue_3604 into 9e1e238 on otwcode:master.

[CristinaRO]

Hah, I shudder to think how many versions have appeared while this was lingering! >.> But it's grey now, anyway.

[sarken]

Updated! We actually want to stick with this version, I think, because it's basically been completely rewritten since this pull request, and we'd have to figure out how to add our customizations back in. Plus we know this version resolves some weird-ass issue on touch screens because someone tested it on my webdev once upon a time, so I like the idea of going with what we know works.

[coveralls]

Coverage remained the same when pulling e2c6ec7 on sarken:issue_3604 into ee00060 on otwcode:master.