Fixed remaining references to the IncomingHeal element.
Show others' heals in slightly darker green than ours.
Take heal prediction into account for low health warnings.

Also display it only on friendly units.
Fixed widget parenting of the heal prediction bars.
Bring back coloring of raid names based on heal prediction.
Make the default color of others' heal darker.
Do not show overshield and only show overheal 25% above maximum heal on raid units.
Fixed heal prediction anchoring on single unit frames.
Single unit frames now always have heal prediction.
Properly chop UTF-8 names on raid frames.
Updated embedded oUF.