Feature request: import chapter info from (another) file in chapter editor GUI

I was wondering if there is any way to do either:

1. directly import chapters info from another file and apply to current file (likely a MKV file)
2. copy chapters from another tab and paste to current file

I think this is particularly useful when you have the chapter file ready, and want to add it to an existing MKV file.

Of course, you can just merge your MKV file and a chapter file; but being able to do so in chapter editor saves lots of time and I/O because you don't need to re-write the whole MKV file on disk (which could be very large).

If it's already possible (or anyway that you don't need to re-write the whole file), feel free to let me know.

Thanks in advance.