A few more keyboard shortcuts for New Validate

[misaugstad]

Brief description of problem/feature

A few more keyboard shortcuts that I think I'd like to make the experience as smooth as possible for the new Validate page, based on testing I've been doing while polishing other parts of the interface:

1. Choosing severity rating with 1/2/3. Kind of a no-brainer. Not sure how much I'd really use them, because when I'm agreeing with a label, I'm often messing with the tags with my mouse anyway.
2. Choosing a reason for disagree/unsure with 1/2/3. Just picking one of the three disagree/unsure reasons using the 1, 2, or 3 keys would be really nice imo.
3. Auto-focusing the open-ended reason text box for disagree/unsure with the '4' key. Then I'd want to be able to remove focus from that text box with the esc key. This would make it so that you could completely do the disagree/unsure validations without touching your mouse quite easily!

This would definitely be for power users, so not sure what the priority is on this. We should probably say that these shortcuts are available in the tooltips over the images? Though there's already quite a bit of text for some of them, and it gets a bit hectic at that point! We could make it more prominent by adding the key in parens after the text. For example: "This is not on a pedestrian path (2)" could be the text for the 2nd reason to disagree with a Surface Problem label, so that you know that you can click "2" to choose that option.

[misaugstad]

@nehaa2426 This page is referring to our "New Validate Beta" page that we created over the summer. The URL is /newValidateBeta, and you'll need to set yourself up as an Admin in your dev env to be able to see the page! I'm guessing the the code you'll need to have access to is in RightMenu.js and Keyboard.js!