pkm editor, sav editor, menus, and a manager to glue the storage slots
together
decouples the pkm/sav editors from a static savefile reference.
improves dragdrop/click view/set/delete indication, hides unavailable
contextmenuitems, and fixes a few incorrect references. Box Subviewer
slots now have all the indication/events that the main save editor slots
have.
pls report behavior bugs 👍
Closes#1135
clear both if zero
set value to dp location if a valid dp location, else set faraway place
set value to pthgss location if originated from pthgss
