Add option to not auto zoom

[sindizzy]

Current Behavior

I love this add-in!!! Love it!!! One improvement that I may suggest is to make the auto zoom an option. Often we are working on a big area of the map and want to see what a range ring might look like in a smaller region. Well I don't necessarily want it to auto-zoom to the graphic just created. Kind of drives me nuts. :) Please consider for next release.

~AGP