Make datepicker accessible

[nosvalds]

Using the https://wave.webaim.org/ tool, I get a number of "Empty button" errors with the datepicker. There are probably other improvements that can be made as well with aria attributes and the like.

It would be awesome if accessibility features were built into this datepicker. Here are some good examples of how to do this: https://www.webaxe.org/accessible-date-pickers/

[Gyurmatag]

Completely agree with this feature request! When this will happen?

[icehaunter]

Yeah, I agree that would be good, however I'm not an active user of the datepicker anymore, so I am very unlikely to implement it myself. Contributions welcome!