datepicker not accessible by screen reader

[Cecilia Vela Gurovic]

There are still a few issues that make datepicker not accessible:

 - when the datepicker field receives focus, the screen reader doesn't see the datepicker form has been displayed
 - when on the datepicker we press 'H' it changes to the timepicker form, but the screen reader doesn't see there has been a change
 - the text with instructions on how to change the time (hours or minutes) is not read by the sr
 - it doesn't say how to come back from the timepicker mode

reported by Julius

[Kristina Hoeppner (kris-hoeppner)]

This will need to be looked at together with bug #1757923

[Kristina Hoeppner (kris-hoeppner)]

Liam, can you please check if these issues occur in the new date picker you implemented? Thank you.

[Liam (liam-sharpe)]

After testing with Julius, 2 problems have been discovered:
• datepicker doesnt open at all on focus
• the screenreader reads 'hh:mm' as 'hours:minutes'. Adding a space between the h's and m's should fix this

There is aria text provided which means that visually impaired users can still use the field, its just the datepicker that doesnt appear

[Kristina Hoeppner (kris-hoeppner)]

Info about screen reader usage: Screen reader user is not able to navigate through the dates in the date picker, but screen reader user is still able to enter the date because of the ARIA description provided by the date field.

Compromise: Leave it like it is because an author using a screen reader can enter a date, and we accept for the time being that there could be a better solution but do not yet have one.