That's an interesting topic!
I made a very simple "focus.vi" a while ago, it has a required enum typedef input with a series of states (urgent, bug, doc, reuse, etc). depending on the state, a pop-up would show up when the VI is executed ; that's how I leave notes for myself into projects.
That's very basic but it helps me.
I though about improving it / integrate it into the project so that my colleagues could use it too but talking about it with them I realized that there was quite a lot of work so I gave up and keep using my simple "focus.vi".
That said, it would be cool if we could have a LAVA discussion on how should that be implemented into LabVIEW and then drop a feature idea on NI forums so that NI Engineers implement it for us
Cheers