EDSC-3075: Fix 508 compliance 'element must contain ALT attribute' finding from SortSite

[mreese84]

Please review Contribution.md before contributing to this project.

Description

Findings using SortSite. SortSite was run locally with Tophat removed and robots.txt allowing PowerMapper.

SortSite can be downloaded/accessed here: https://inside.nasa.gov/webservices/support/section-508-testing-sortsite

Page	URL	Description	Notes	Guideline	Line	Count
/preferences	http://localhost:8080/preferences	Each A element must contain text or an IMG with an ALT attribute.	Add text to the link, or ALT text if the link contains an image. If there is no link text or the ALT text is blank, screen readers have nothing to read, so read out the URL instead.	WCAG 1.0 AA 13.1	340	1

Files

Acceptance Criteria

Fix 'element must contain ALT attribute' for all findings from SortSite to be 508 compliant.