Script Editor Non-English Characters Problem

[lacriment]

I'm using a Turkish keyboard and Turkish keymap. When I press the Turkish characters on my keyboard it doesn't shows Turkish characters on script editor but it cause syntax error, "unknown character". So everytime I press turkish characters by mistake or by forgetting GDScript doesn't support utf-8 I have to open script file with another text editor and delete the unknown(turkish) characters.

[lacriment]

ÜĞİŞÇÖüğşçöı these are the Turkish characters.

[akien-mga]

Duplicate of #871.