Add modern versions of Microsoft Offices docs to templates

The templates in the folder “Office” at Data > New From Template > Office does not include modern versions of Microsoft’s Office documents: .docx, .xlsx, nor does it include PowerPoint .ppt or .pptx documents. Yes, we can add these to our own template folders, but the standard downloads of DEVONthink’s editions probably should include these versions by default for consistency with Office versions later than 2007.