Activate Tab

Hello - Great plugin! I was wondering if you could make it (at least for the safari plugin) so that you could activate the tab if gmail is already opened? 

In other words, I already keep gmail as one of my pinned tabs. When I see a new notification from X-Notifier, I click on it and then it opens up another new tab instead of just using the one I already have open. It would seem easy to just use the existing one. There are some other gmail notifier plugins that do use the existing tabs so I know there is a way to do this. It would just be cool if it could be added to this plugin. :)

Thanks!