Accessibility features in the new release

[deborah]

There are a few accessibility improvement in last night's code push, detailed here for your viewing pleasure:

• The form to submit a support request now has labels so it can be reasonably navigated with a screenreader.
• The UI used by support volunteers now has improved visual indicators so that it doesn't rely on colors to relay information.
• The cut tag arrows are now higher resolution and scale properly for people using larger font sizes.

There are also two accessibility *ahem* bugs introduced in last night's code push: the new cut tag arrows don't have a white outline so they are difficult or impossible to see on dark backgrounds, and a fix to the contextual userhead hover to fix coloration in certain styles causes viewing problems in certain other styles. Fixes for both of these will be pushed ASAP.