EDF's 4th level is not displayed properly.

When having aghs, his ult should actually show a 4th level. As of now, it only does so in the tooltip, but the ability still shows 3 levels below the icon, so the level 4 tooltip values never highlight.

Also, in the tooltip, the values for Corrosive Breath damage and duration, and Frost Breath movement speed slow, attack speed slow and duration are all hardcoded, instead of calling the values like how it's done for the splash radius and splash damage