html5fallback.js generates errors

[cr2a-graphique]

Hi, with my fellow worker @vinespie we found a mistake are generate by html5fallback.js

example :
For the mod_login, when you go out of a field like username "html5fallback.js" generate a aria-invalid="false" in the label.

aria-invalid is not used for label.

[zero-24]

Closing as we have a PR: #6631 Thanks

[vinespie]

According to accessibility standards attribute "aria-invalid" should be only placed on the attribute "input" not on the label coresponding.
https://www.w3.org/WAI/GL/wiki/Using_Aria-Invalid_to_Indicate_An_Error_Field

Actual result

1. Go to "index.php?option=com_users&view=login&Itemid=233" or login page
2. Do not enter a login information and click the button
3. You must see the input login incorrect, the label "Username" with attribute "aria-invalid" set to true.

Test instructions

1. Apply the patch
2. Go to "index.php?option=com_users&view=login&Itemid=233" or login page
3. Do not enter a login information and click the button
4. You must see the input login incorrect, the label "Username" with no attribute "aria-invalid"