Excel Files should open in DocViewer (SpeedGrader) when using Canvas Teacher App

[sobrien]

I am an Accounting teacher who uses tons of Excel files with my students. I would love to be able to grade their files on my iPad in DocViewer. I love the App except for this. 

[tina_christophe]

This feature was available last year in the teacher app - please fix this so we are able to correct all the files that are noted as supported in your documentation.

thank you