Create radial on student page for overall course grade

[roelmann]

[roelmann]

Can this use the code for the progress radial, but provide a different %age?
Can grade be forced as a %age (to allow calculations for radial), even if displayed as a total or letter/scale?

[roelmann]

Possible for v2, but on hold for now pending further feedback - current feedback suggests the simple link to the grade table is preferred.