Also, it seems like these sort of case-by-case adjustments could be eliminated by just using `event.pageX`/`pageY` and then adjusting based on the `$.offset()` of the image.  I think that could also drastically simplify the code in `_handleMouseEnterOrExitScaleSticker()`.

(Though if my comment above is correct, for _this_ function none of the adjustment code is even needed anymore).