[Feature request] Open new message composer window from tray menu

[geckolinux]

Hi, I've been using Birdtray, and it looks like the latest Thunderbird beta might include some native tray functionality for Linux, but I like the integration and features of systray-x as it stands now. The only feature it's missing that I use constantly with Birdtray is the ability to right-click on the tray menu and select a "New message..." item to open the new message composer window.

Thanks for systray-x!