MS has launched an app called "Office" for iPhones about a year ago. This app combines the Word, Excel, and PP apps into one interface, streamlining editing processes and saving storage space on the phone. However, when I want to open an office document (.xls, .docx, etc) from dropbox, it asks me to install the individual Word, Excel, PP apps. I cannot open the documents in the "Office" app. When will this functionality be supported?