We have added quite a bit of new logging options over the last releases and the "log viewer" search form looks a little bit cluttered now. It would be nice if we could improve the display to make it easier to find action that is valid for a certain module.
I've been thinking about this too, and have the start of a patch. I was working on tying the module checkboxes to the action checkboxes so that unchecking a module will deactivate any action which is tied specifically to that module.
That would be pretty awesome.