Issue List: Issue: Use field sets and legends to group related form controls

Fieldsets around groups of related form elements can improve accessibility within AT and improve page semantics.

Limit the use of field sets to small groups of controls and avoid nesting. Nested field sets behave differently/are read differently across different screen readers and browsers.

An initial investigation of the areas in the LE that would benefit from field sets has been completed. We plan to build field sets into our framework where possible. This item is being worked on, but not yet scheduled for a release.