The editable grid currently has a number of column type limitations. These should be remedied, and all column types should be allowed to be editable. At the very least, the Status/Status Reason columns.  (https://learn.microsoft.com/en-us/dynamics365/customerengagement/on-premises/customize/make-grids-lists-editable-custom-control?view=op-9-1#data-types-that-arent-editable-in-an-editable-grid)