Sure. I really like it. I use this for two months from the time you added this feature to the code.
I assigned the F1 key to the Mend command, and Shift-F1 to Mend and Prettify.
When I want to see (some) entities I prefer to use the ShadyCharacters plugin. Continuous changing Preferences / Preserve Entites takes too long.
Now I'm only doing F1 (Mend), and when I want to see (some) entities, I run the plugin (one click). Quickly and efficiently!
In the target file, I prefer not to have a special spaces entities, since Sigil now displays them so nicely in the Code View, which makes reading easier.
The most important thing is that such a feature has appeared. And thank you very much for that.