Color entered when hitting 'enter' key

[jsurato]

On first page load:
Selecting a color via mouse event causes a bug where the user can fill the next two color entries by pressing enter.

steps to reproduce:

1. Hard refresh the page
2. Select a color by clicking one of the QWERTY selectors
3. Press enter. Notice the next space fills with the color you just clicked.

Note: If you fill the entire first column via clicking, the same behavior can be observed in the second column.

Also note: Vimium controls currently override QWERTY keyboard selections. don't be alarmed, just turn off the extension