Make dropdowns accessible

[noahmanger]

From Nick:

• The name search field doesn’t have an id
  • Based on the label it should be id=‘q’
• Each group of checkboxes is in a field set
  • These need legends, for example the legend for the first on should be “Election Years”
  • If you don’t want to use legend, everything will need to be associated with aria
• For the control of the selects
  • Aria instructions need to be added to the more buttons
  • Focus is lost when selecting an option in the list. Pressing TAB after selecting one sends you back to the top of the document