Display grades using only one table column

[xsznix]

Merge the points earned and points possible columns. The behavior of the new resulting column should be for each assignment:

• If the number of points possible is not 100, display "/00" after the number of points earned, where "00" is the number of points possible.
• If the weight is not 1, display "×00" after the number of points earned, where "00" is the weight and "×" is a suitable, slightly spaced out glyph representing multiplication.

The above conditions should be mutually exclusive, but in any edge case where they are not, render the final grade as "00/00×00".

This behavior should be consistent with the current behavior of the iOS app.

[xsznix]

fixed in 0c6fa80c62f728edc6e64ff8c65ce38d93fee956