Incorrect use of aria-labels

[rogierv88]

Some elements have aria-labels that can not have these labels. Aria labels should only be applied on interactive elements or HTML landmarks. As far as I could find this applies to the 404 h1 element and the disabled version of the LinkButton element.

[benjaminrae]

As far as I can see this use of aria-label is valid according to https://w3c.github.io/aria/#aria-label

However as it says title may be preferred but would create a tooltip, or even aria-labelled-by.

[rogierv88]

As stated on https://developer.mozilla.org/en-US/docs/Web/Accessibility/ARIA/Attributes/aria-label, the aria-label should only be used on interactive elements or HTML landmarks. Which is not the case for an h1 or span element.

[satnaing]

Thanks for pointing this out! This issue will be fixed in #346