Accordion header '+' image missing alt attribute

[deneb-alpha]

Project Title: Uyuni Website Refresh - Accessibility and Responsiveness (#205)

Accessibility/Responsive Issue

Page
Home/landingpage

Description
Alt text is missing on the image tags for the '+' svgs on the accordion section headers

Proposed Solution
This is an interesting one, because there's a couple ways to think about it...
The accordion is already open and displays the description under the title to the user - is the '+' an icon as in, does it convey meaning, or is it decorative.
A '+' would universally be understood as addition, but in the context of a collapsible accordion maybe a 'v' is more informative for 'expand' and '^' for 'collapse would be a better choice.
Or are we trying to build semantic markup.

Solutions
Solution 1 (quick): Give the in the accordions an alt attribute.
Solution 2 (semantic): Pull the tag out of the image, and use aria-hidden (if decorative) and role attributes.

Additional Notes

• Article on font icons/icons and svg for consideration.
• Article on semantics.

Screenshot