Proposed additional features

[OprekersMania]

Hello, I am very proud of this utility that you created. I use it very often to modify gfx fonts for my arduino projects from several years ago. I also want to inform you and apologize in advance if I duplicated your repository incorrectly, because my knowledge of using GitHub is still limited. I tried to modify your code according to my own needs with the limitations of my knowledge. I edited all your code offline and then uploaded it to github. Maybe if you like my modifications, this could be an input for your next code. You can check the results of my modifications here: https://oprekersmania.github.io/Adafruit-GFX-Font-Customiser/

repos: https://github.com/OprekersMania/Adafruit-GFX-Font-Customiser/

Thank you for your willingness to read my message, and once again I apologize for everything.