mapper work

-draw rect on mouse over
-set default vis to 55
-fixed bug where bounds_changed was fired even when first drawn
--had to fix visualRect drawing flow (it would overwrite, but not delete the old one, thus the listeners were still there)
-fixed issue where first draw was of previous overlay (fixed with flow changes)
-fixed issue where overlay was deleted if no changes were made on save
--changed flow of deleting prev overlay for redrawing
-took out rectangle placer type references (no longer used)
-changed rect options to sobek standard
-tied rotate and trans to working overlay
-working on preserving rotate on new overlay