Hello, I managed to implement this. It is working on OpenSUSE Tumbleed on Gnome 44, I just had a question what should be the min and max values for the width, I have set min to 1 which makes sense since 0 means no border and we already have a toggle for that but I am wondering what would be appropriate max value I am currently using 15?

Edit: Above 5px the borders are not uniform on all sides.

Awesome! Feel free to open a pull request, even if the borders are uneven above 5px. Maybe someone will have an idea and be able to help make it uniform.

Also, I wonder if it would also be nice to add a setting that lets you determine whether the hint should be aligned to the outside, inside, or in the middle of the window edge? Not trying to be choosy beggar or anything, just sharing ideas 😅

Also, I wonder if it would also be nice to add a setting that lets you determine whether the hint should be aligned to the outside, inside, or in the middle of the window edge? Not trying to be choosy beggar or anything, just sharing ideas 😅

Thanks for your valuable input it seems like a good idea however I am not sure how to go about it right now so I will take a look again and try to implement it later.