[Cuis-dev] [ChangeSet] Enhancements to fonts

[Juan Vuletich]

With Luciano we've been working on a few tweaks to Fonts. These changes:
- Load only latinn glyphs by default for TrueType fonts, saving lots of 
memory
- Clear font caches on image save (only actually used glyphs will be 
late recreated)
- Add a method for always using left arrow for underscore, for those who 
prefer it that way.

Please review.

Thanks,

-- 
Juan Vuletich
www.cuis-smalltalk.org
https://github.com/Cuis-Smalltalk/Cuis-Smalltalk-Dev
https://github.com/jvuletich
https://www.linkedin.com/in/juan-vuletich-75611b3
@JuanVuletich

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