More informative trigger display in the trigger list editor

[gajop]

Currently we only display the name of the trigger.
In a large enough project, even if we chose those names well, it can still be hard to distinguish what each does. While we could invent some type of tagging/grouping system to better organize big projects, it would also be useful to simply have more informative displays (needs to be imagined and designed).
Ideally we'd use the content of the trigger itself to improve display.