Allow setting Blood Charges to 0

[Paliak]

Fixes #5657 .

Description of the problem being solved:

Due the the count input being used for Blood Charges input box on the config tab setting the blood charge count to 0 resulted in defaulting to max blood charges.

There also seem to be some off by 1 issues with count boxes due to

PathOfBuilding/src/Classes/EditControl.lua

Lines 692 to 695 in dec27c9

	elseif key == "WHEELDOWN" or key == "DOWN" then
	if cur and (self.filter ~= "%D" or cur > 0)then
	self:SetText(tostring(cur - (self.numberInc or 1)), true)
	else

But not sure how to properly fix.