Thanks. I will add it to my feature list. It should be quite easy to add but I can't predict when I will look into it.
It is super useful but to improve it a little more I think they should add the only selected thing to everything as there are some that do not have it like the collections
You can use only selection on collections if you rename them from the outliner with the popup (Ctrl + Shift + F2 by default). I can only access the selected collections if it's started from the outliner and I can access the outliner context.
The extra functionality is so useful compared to the built-in renaming experience.
using this add-on since forever. I wonder if the ability to rename the new hair system objects will be supported in the future. thank you~