Power BI Desktop for report server - Improve Accessibility for blind user

Improve usage of interactive elements for blind users.
- Checkboxes and columns are not accessible by keyboard if the screen reader is running.
- The role of many interactive elements is not perceivable, no role information is put out
-The hierarchy level of some elements is visually displayed only via differing spaces before the elements but not put out by the screen reader.
-For some field-checkboxes the description of another field is put out.
- for some of the field checkboxes the misleading information “Selected” is put out
- Following data tables cannot be perceived by blind users in a structured way.
-- table of the Power Query-Editor
-- table of the dialog “manage relations"