In stable, there was support for mixed fonts (some coming from the
user's skin, with fallback missing characters generated from TTF
backend).
We don't really have support for this so this is a simple in-between for
the time being.
I dunno what the wiki is claiming with the "24px" figure or why
but I'm not playing conversion games either. Dimensions ballparked
via screenshots captured at x768 resolution.
Also removes a weird homebrew method to keep the text upright.
There is one canonical way to do this, namely
`UprightAspectMaintainingContainer`. And the other key counters
were already using it.