Zoom control

[darbyshj]

-A zoom tool or changing how the mouse wheel works with zoom would be nice - before, in the in-browser preview, one scroll wheel movement zoomed in one level, centered on the area under the mouse. Now it zooms in 4+ zoom levels and is hard to control. Using the plus/minus in the upper left of the preview window lets you move one level at a time, but you can't control the centering.