Add harvested sprites...

-Moved the core functionality of plant sprites into a base sprite
type…then based corn, grass, cover crop sprites on the base sprite...
-Added harvest option on plant sprites
Harvest crops when Round Wrap Up stage starts...
Add option to have a toggleSprite start off not shown...

-Also added code to conditionally show toggleSprite attibute change. If
sprite is currently hidden, forcing it to be shown is a bad idea...
Bah, network changes for local work...