As usu­al, a video show­ing it:

The cur­rent sta­tus is that the in­fra­struc­ture re­quired for the stylesheet ed­i­tor is in place:

• I fig­ured out how to turn the StyleSheet ob­­ject back in­­­to a JSON stylesheet.

• The changes are done and merged back in­­­to the same file.

• There is UI for 3 of the 6 re­quired pieces. The mis­s­ing ones are text styles, em­bed­d­ed fonts, and con­­fig op­­tions (like, break sub­­sec­­tions to odd pages)

• The UI for the whole app is pret­­ty rough, I am in full make-it-­­func­­tion­al mode right now. It will be rethought lat­er on.