Upgrade cores

#REDIRECT Cores
Upgrade core is used to upgrade item's level (+0 to +1 and next..).
We can use it by clicking on it right mouse button and left on item that we want to upgrade.
We dont pay for upgrade to level +7.
Here we have:
Upgrade Core (Low) - Used to upgrade Citrine/Aramid/Shadowsteel or lower grade equipments.
Upgrade Core (Medium) - Used to upgrade Pherystin/Titanium or lower grade equipments.
Upgrade Core (High) - Used to upgrade SIGMetal or lower grade equipments.
Upgrade Core (Highest) - Used to upgrade Mithril or lower grade equipments.
Chance to succeded upgrade:
+0 to +1 - 99%
+1 to +2 - 99%
+2 to +3 - 52.5%
+3 to +4 - 41.25%
+4 to +5 - 30% (if fail, item level will be degraded to +3)
+5 to +6 - 18.75% (if fail, item level will be degraded to +4)
+6 to +7 - 8% (if fail, item level will be degraded to +0)
We can use Enhancer Core (High) or (Highest),
and then we have increased chance to succed:
+0 to +1 - 100%
+1 to +2 - 100%
+2 to +3 - 100%
+3 to +4 - 100%
+4 to +5 - 60%
+5 to +6 - 30%
+6 to +7 - 15%
If fail, penalty is this same as without enhancer.