Go to glyph

double click on string view to go to focus glyph
add glyphs
debug spacing
add glyphs
debug Cv/Ch
debug Circumflex contrast
Test spacing

look for the smallest/highest values in each glyph and adapt the
default spacing values.

FIXME: left values on single view: ok, but in string view it does not
work correctly (especially glyphs without components)
Add glyphs