Lock Source and Program Windows From Resizing

While I really like the ability to zoom in and out on the program/source windows, it's really annoying when it randomly zooms in or out with a slight touch of the mouse. I realize this is priimarily an Apple Magic Mouse issue, but it would be helpful if you could easily lock the window to keep this issue at bay. When I need to zoom in to adjust text or whatnot, I could just unlock with a keystroke or mouse click.

I know this is a common issue for a lot of people and I'm hoping to get this upvoted.