The best time to take care of something important is immediately.
I want my extensions to be the best, and your suggestion rang the enhancement bell quite nicely.
I have implemented BOTH of your requested features. Version 1.5 adds both an optional search feature, and optional toggle for making the lat/lon field writable.
Thanks for the suggestion! Your Joomla Updater should notify you of the 1.5 version within an hour (my update automation runs hourly)