Fix some "double-binds" of the backbuffer.

These are already eliminated by the queuerunner, but better not to
generate them in the first place, for easier sanity checks.

Common/GPU/Vulkan/VulkanRenderManager.cpp

@@ -1383,6 +1383,7 @@ void VulkanRenderManager::Finish() {
 	EndCurRenderStep();
 
 	// Let's do just a bit of cleanup on render commands now.
+	// TODO: Should look into removing this.
 	for (auto &step : steps_) {
 		if (step->stepType == VKRStepType::RENDER) {
 			CleanupRenderCommands(&step->commands);

GPU/Common/FramebufferManagerCommon.cpp

@@ -1547,6 +1547,7 @@ void FramebufferManagerCommon::CopyDisplayToOutput(bool reallyDirty) {
 		// No framebuffer to display! Clear to black.
 		if (useBufferedRendering_) {
 			draw_->BindFramebufferAsRenderTarget(nullptr, { Draw::RPAction::CLEAR, Draw::RPAction::CLEAR, Draw::RPAction::CLEAR }, "CopyDisplayToOutput");
+			presentation_->NotifyPresent();
 		}
 		gstate_c.Dirty(DIRTY_VIEWPORTSCISSOR_STATE);
 		return;

GPU/Common/PresentationCommon.h

@@ -104,6 +104,10 @@ public:
 	bool PresentedThisFrame() const {
 		return presentedThisFrame_;
 	}
+	void NotifyPresent() {
+		// Something else did the present, skipping PresentationCommon.
+		presentedThisFrame_ = true;
+	}
 
 	void DeviceLost();
 	void DeviceRestore(Draw::DrawContext *draw);

UI/EmuScreen.cpp

@@ -1342,13 +1342,13 @@ ScreenRenderFlags EmuScreen::render(ScreenRenderMode mode) {
 	if (mode & ScreenRenderMode::TOP) {
 		System_Notify(SystemNotification::KEEP_SCREEN_AWAKE);
 	} else if (!Core_ShouldRunBehind() && strcmp(screenManager()->topScreen()->tag(), "DevMenu") != 0) {
-		// Not on top. Let's not execute, only draw the image.
-		draw->BindFramebufferAsRenderTarget(nullptr, { RPAction::CLEAR, RPAction::CLEAR, RPAction::CLEAR, }, "EmuScreen_Stepping");
 		// Just to make sure.
 		if (PSP_IsInited() && !g_Config.bSkipBufferEffects) {
 			PSP_BeginHostFrame();
 			gpu->CopyDisplayToOutput(true);
 			PSP_EndHostFrame();
+		} else {
+			draw->BindFramebufferAsRenderTarget(nullptr, { RPAction::CLEAR, RPAction::CLEAR, RPAction::CLEAR, }, "EmuScreen_Stepping");
 		}
 		// Need to make sure the UI texture is available, for "darken".
 		screenManager()->getUIContext()->BeginFrame();