Core/Db/Conditions:

-Drop condition CONDITION_SPELL_SCRIPT_TARGET, use other condition types instead
-Change CONDITION_SOURCE_TYPE_SPELL_SCRIPT_TARGET to CONDITION_SOURCE_TYPE_SPELL_IMPLICIT_TARGET:
--allow using this condition for more spell implicit target types (not just ENTRY)
--SourceGroup value for this src type is now effMask and it's now required

Core/Spells: Unify the way implicit targets are handled, fully implement some partially implemented target types, fix some minor bugs found on the way, general improvements and cleanup.

src/server/game/Entities/Object/Object.cpp

@@ -1085,9 +1085,9 @@ bool Object::PrintIndexError(uint32 index, bool set) const
     return false;
 }
 
-bool Position::HasInLine(Unit const* target, float distance, float width) const
+bool Position::HasInLine(WorldObject const* target, float width) const
 {
-    if (!HasInArc(M_PI, target) || !target->IsWithinDist3d(m_positionX, m_positionY, m_positionZ, distance))
+    if (!HasInArc(M_PI, target))
         return false;
     width += target->GetObjectSize();
     float angle = GetRelativeAngle(target);
@@ -1502,14 +1502,14 @@ bool WorldObject::IsInBetween(const WorldObject* obj1, const WorldObject* obj2,
     return (size * size) >= GetExactDist2dSq(obj1->GetPositionX() + cos(angle) * dist, obj1->GetPositionY() + sin(angle) * dist);
 }
 
-bool WorldObject::isInFront(WorldObject const* target, float distance,  float arc) const
+bool WorldObject::isInFront(WorldObject const* target,  float arc) const
 {
-    return IsWithinDist(target, distance) && HasInArc(arc, target);
+    return HasInArc(arc, target);
 }
 
-bool WorldObject::isInBack(WorldObject const* target, float distance, float arc) const
+bool WorldObject::isInBack(WorldObject const* target, float arc) const
 {
-    return IsWithinDist(target, distance) && !HasInArc(2 * M_PI - arc, target);
+    return !HasInArc(2 * M_PI - arc, target);
 }
 
 void WorldObject::GetRandomPoint(const Position &pos, float distance, float &rand_x, float &rand_y, float &rand_z) const