In subtitles selection, display whether sub is embedded or external

Especially useful on iOS
I watch very often material where subtitles are embedded but cannot be transcoded. Most of the time I have an external SRT file as well, but there is no easy way to understand which one you are selecting in the "Information" pop-up on iOS. Also, I understand that PGS support is coming, but in the majority of cases PGS subtitles are styled in a way that uses a lot of screen real estate, so I usually prefer SRT if I can get hold of them.
So far the only workaround has been ro rename the SRT appending some language code (.it for example) to differentiate from the embedded one, but it would be great if the software could display "SRT" or something next to the Languages.

Currently the drop-down box displays:
- None
- English
- English

My wish:
- None
- English
- English (SRT) or English (Ext) or really whatever accomplishes the task :)

EDITED for clarity

Early 2021 clean-up: implemented