Fixed last known caveats

Last known caveat: If a removed item from hand has same effects as one
or more of the same equipped item(s)'s effects, it will not keep the
duplicated effects but remove all of them. It will only resolve when a
player opens up one's inventory then close, or relogins.

Also fixed: All effects clearing when using /aieclear
Also fixed: Apparently there were problems with adding equip effects
using mouse event to equip. That seems to be fixed; however I have added
debug just in case.