I saw another topic someone suggested a Jump to highlight command.
However, I suggest an @window be made.
In this thread
you refer to, $ishighlight had been suggested - and with such an identifier (that we do not have (so far)), your "custom window listing all highlights if set away" could be made quite easy - and a lot of other interesting highlight-related scripts.
You request a precast sollution - I'd like to have the means to build indivitual sollutions (like yours) instead
Be it a new event, an operator or an identifier, I'd be glad to see a secure method to pick highlighting lines.