Cantarell does not contain Greek glyphs

Submitted by Alkis Georgopoulos

Description

Hi, Cantarel does not contain Greek glyphs and so the default Gnome UI looks horrible now for Greek users, as Greek characters are substituted with another font of different size. For example, in the "Email και ημερολόγιο" menu item, the "και ημερολόγιο" part is bigger and uses a different font face. I'm attaching a menu screenshot to better show the problem.

Please add Greek glyphs in Cantarell.