Update braille and speak active cell and its content in MS Excel when UIA is not used and control+y, control+z or alt+backspace is pressed (#15595)
fixes #15547
Summary of the issue:
When UIA is not used and control+y (redo), control+z / alt+backspace (undo) is pressed, braille is not updated and active cell and its content is not spoken.
Description of user facing changes
Braille is updated and active cell with its content is spoken.
Description of development approach
Added gestures control+y, control+z and alt+backspace to NVDAObjects.window.excel.ExcelWorksheet.script_changeSelection.