I created my own IMarker which will work as a kind of code annotation
mechanism. So i'll use them to annotate parts of code.
I'm now trying to figure out a way to add some actions to create and
remove them. Those should be kind of similar to those from bookmarks.
Can someone point out for me how to actually register my actions to the
context menu of the vertical rule? I couldn't find out the extension
point (well rather the uri for the context menu on the vertical ruler)
to go for.