You can add a Xinha button to any menu bar, which will pop up the editor window at any time.
I’ve had the button on my menu bar in the past, but never used it, I just use it for FR and other forum postings.
Huh. I’ve added it to my menu bar, but it grays out. Even when I have this comments window open it’s grayed out. The only way I can use it is with a right-mouse-button click.