Is your feature request related to a problem? Please describe (REQUIRED):
Usually we use several fonts in our games to nicely display different numerical information (damage value, speed dial and so on). And Defold includes all ASCII characters in fonts. However, for this case, it doesn’t make sense to store unused glyphs in the fonts . Especially if it’s a web game where the download size matters.

Describe the solution you'd like (REQUIRED):
Add an option to not include ASCII characters, only those specified in Extra Chars. To avoid using third party tools as in the link below.

Describe alternatives you've considered (REQUIRED):
https://forum.defold.com/t/big-list-of-defold-pro-tips/1519/111?u=aglitchman