Fixed the 2D rendering order makes the layer priority higher than the Z

Source/Urho3D/Urho2D/Renderer2D.cpp

@@ -404,12 +404,12 @@ void Renderer2D::GetDrawables(PODVector<Drawable2D*>& drawables, Node* node)
 
 static inline bool CompareSourceBatch2Ds(const SourceBatch2D* lhs, const SourceBatch2D* rhs)
 {
-    if (lhs->distance_ != rhs->distance_)
-        return lhs->distance_ > rhs->distance_;
-
     if (lhs->drawOrder_ != rhs->drawOrder_)
         return lhs->drawOrder_ < rhs->drawOrder_;
 
+    if (lhs->distance_ != rhs->distance_)
+        return lhs->distance_ > rhs->distance_;
+
     if (lhs->material_ != rhs->material_)
         return lhs->material_->GetNameHash() < rhs->material_->GetNameHash();