I'm working with TFT displays and need to have readable cyrillic strings in code. Prior 1.6.6, having my files in win-1251 encoding and adding preproc.substitute_unicode=false in preferences.txt worked fine for me. But since upgrade, IDE shows squares instead of non-ascii chars that makes it impossible to read. Please fix.

Cyrillic in IDE 1.6.6
wrong

Same file in Sublime text editor
correct