title: file chooser dialog can only be shown with a user activation issue
body: <p>I run my share point on chrome and launch my Microsoft office online but when i try to insert picture, no file picker dialog pop up in excel or power point. </p>
  
  <p>From developer console, i see "file chooser dialog can only be shown with a user activation"</p>
  
  <p>Help is greatly appreciated. thanks.</p>