As a user having problems with mouse use, I want to open revision slider.
Context of use:
I assume the user would use the keyboard, if not via accesskeys via TABbing
When the header bar of the slider accordion widget is focused using tabbing, it still can’t be opened by the standard-toggle via space or enter key
On pressing Space or Enter while focusing the header bar the revision slider should open. After opening it once via mouse, the open/closing via keyboard works! So the event trigger for this probably needs to be added to the lazy load JS.