Made rendering engine choice persist when ComponentPeers are re-created.

modules/juce_gui_basics/components/juce_Component.cpp

@@ -565,6 +565,7 @@ void Component::addToDesktop (int styleWanted, void* nativeWindowToAttachTo)
         bool wasMinimised = false;
         ComponentBoundsConstrainer* currentConstainer = nullptr;
         Rectangle<int> oldNonFullScreenBounds;
+        int oldRenderingEngine = -1;
 
         if (peer != nullptr)
         {
@@ -574,6 +575,7 @@ void Component::addToDesktop (int styleWanted, void* nativeWindowToAttachTo)
             wasMinimised = peer->isMinimised();
             currentConstainer = peer->getConstrainer();
             oldNonFullScreenBounds = peer->getNonFullScreenBounds();
+            oldRenderingEngine = peer->getCurrentRenderingEngine();
 
             flags.hasHeavyweightPeerFlag = false;
             Desktop::getInstance().removeDesktopComponent (this);
@@ -598,6 +600,10 @@ void Component::addToDesktop (int styleWanted, void* nativeWindowToAttachTo)
 
             bounds.setPosition (topLeft);
             peer->setBounds (topLeft.x, topLeft.y, getWidth(), getHeight(), false);
+
+            if (oldRenderingEngine >= 0)
+                peer->setCurrentRenderingEngine (oldRenderingEngine);
+
             peer->setVisible (isVisible());
 
             peer = ComponentPeer::getPeerFor (this);