Default font char / glyph in lower right

[ylluminate]

Any chance you can add a function that will also list the current default font's ASCII glyph equivalence for this character in the lower right corner? I'm doing some work in resolving missing fonts in old web pages for ancient languages and it used the old method of doing glyph substitution for characters. So you'd pop in an A and get glyph at index #65 and I'm having to look a lot of these up. An example of what I'm talking about is:

So you'd just have a checkbox in the UI that would give say something like "Show Default ASCII Substitution Equivalent".

[mathew-kurian]

If you have a PR, will be happy to merge