Add ScriptLang ComboBox #82

ScriptLang plays an important role on Glyph Shaping

for example, Thai Script is a 'complex' script (need GSUB, GPOS)

pic 1: Thai glyphs with incorrect ScriptLang (in red box, latin), shows abnormal result

pic 2: Thai glyphs with correct ScriptLang (in red box, Thai), shows NORMAL result

Now, How about your 'Script' ?, Dose Typography present the text correct or not?

:)