Fixed for description field first responder bug.

Bug happened on details page for already uploaded files. If details text box was tapped, then device was rotated, the details would auto scrolled incorrectly (this auto scrolling should only happen when the keyboard is visible when editing description on yet to be uploaded file).
Made category text size match other details page text size.
Merge pull request #113 from montehurd/detailsDetails

Fixed description box bug and adjusted category text size.