In the graphite UI the Shit+arrows can be used navigate comments. It is very handy, but I miss I can't configure or have another way to navigate only non-resolved commments. When you are looking for pending issues, I use they shortcut, but opens the fixed comments when browsing them, and I need to check each comments to see if it is solved (which the UI doesn't show very clearly, is just a solft label, no colored red/green icon or similar)