single-click in roaster window if GNOME is set to use single click
There is a setting in GNOME that makes applications such as nautilus use single-clicking. Some other software (such as gthumb) now follow this setting, and, for the sake of consistency (I find single-click very grand-mother-friendly), I would like gajim to check for that setting in GNOME (and maybe in windows too, after all), and allow opening a conversation window by single clicking a buddy in the roaster window. This could also apply in "chat rooms" (conferences), when you left-single-click someone in the user list.
When hovering over an item, you can make it "selected" or not, that's up to you guys. I know nautilus doesn't do that, hopefully, because in nautilus you can select more than one item at a time, but in gajim you cannot, so I don't actually care if the contact automatically gets selected when the mouse hovers over it. It is, however, an interesting visual cue, but it may take more CPU juice.
You can determine this setting in gconf with this key: /apps/nautilus/preferences/click_policy
The value can be "single" or "double".