Remove WCAGUtilities class and use proper WCAG widgets instead

[chalkos]

This class solves WCAG "issues" by setting meaningless title and alt attributes on elements that require it. It was probably a quick fix and meant to be handled in a better way later on.

Remove this class and create specific "AccessibleSomething" widgets that actually improve the accessibility of components by setting their attribute values to something meaningful.

[chalkos]

#1255 touched this problem but improved WCAGUtilities instead of addressing the root of the problem