Change cursor direction.

[jgaehring]

A test to see if this fixes #324.

🤞

[jgaehring]

This appears to be a bug in Safari, so I opened a report here: https://bugs.webkit.org/show_bug.cgi?id=209429.

Since this can't really be resolved on our own, I've implemented a workaround, which hopefully won't have any adverse affects. Basically, instead of advancing the cursor the previous unique item, it should just advance to whatever the previous item is. There shouldn't be non-unique items in the stores, so long as we're generating the localID's correctly, but it was a nice safety measure to be able to select on unique items. Perhaps if the bug in Safari gets fixed we can revert. In any event, this should indeed resolve #324.

I've also included a fix for another bug I found, which was overwriting defaults in fresh installs and causing errors.