Added appropriate delete statements.

src/dawn/scene/components/ui/UICanvas.cpp

@@ -45,6 +45,12 @@ void UICanvas::onBackBufferResize(
 }
 
 UICanvas::~UICanvas() {
+  auto it = this->children.begin();
+  while(it != this->children.end()) {
+    delete *it;
+    ++it;
+  }
+
   this->getGame()->renderManager.getBackBuffer()->eventRenderTargetResized
     .removeListener(this, &UICanvas::onBackBufferResize)
   ;