Reusable hanging indent style for long string values
Standardized all table footer elements in preparation for refactoring them.
Replaced legacy misleading CSS class name with footer element.

Also, remove some unused CSS.
Rename allowEnterKeySubmit to allowEnterKey

This makes more sense for forms with interactive multi-line textarea fields where users must type multiple lines of text including the Enter key, without submitting the form until later.
Suppress warnings
Simplify UserContext creation in tests
Merge pull request #434 from joesondow/Refactor-styles

Refactor styles