Improve display of .d file name in graph

Suggested configuration options for prettification: 1) show just module name (with tooltip to show .d name) 2) show just .d file name with ".d" truncated off the end (with tooltip to show module name) 3) show both module name and full .d file name on two separate lines (this is the current behavior)

I almost think that 2) should be the default behavior even without the bonus tooltip option. (in the case in #2 where there is no .d file, then show the module name instead.)

in the case of copystatus, I'd say if you choose "show copystatus" then it should always behave like #3. (FWIW, the current behavior only shows the first parameter of copystatus. This may be OK with the current behavior, but the 2nd parameter should at least be available by tooltip if we ever get to this ticket...)

Please excuse my using reserved character pound to refer to tickets when I really just wanted to refer to my own points earlier...

Hm, what do you guys think about the underscore becoming a space in the graph? I'm thinking it might be worth keeping the underscore to preserve the file name.

for just 2) above, perhaps also optionally truncating the path up to the .d file. See attached.

One really nice thing about having the option of 1 or 2 is that the graph takes much less space on the screen, and one can leave multiple graphs up as monitoring panels.