Fix some issues with freeing resources

openVulkanoCpp/Vulkan/CommandHelper.hpp

@@ -46,6 +46,7 @@ namespace OpenVulkano
 			{
 				device.freeCommandBuffers(cmdPool, 1, &cmdBuffer);
 				device.destroyCommandPool(cmdPool);
+				cmdPool = nullptr;
 			}
 		};
 	}

openVulkanoCpp/Vulkan/Context.cpp

@@ -45,6 +45,7 @@ namespace OpenVulkano::Vulkan
 
 		swapChainRenderPass.Close();
 		swapChain.Close();
+		device = nullptr;
 		deviceManager.Close();
 		vkDestroySurfaceKHR(static_cast<VkInstance>(instance), surface, nullptr);
 		//TODO

openVulkanoCpp/Vulkan/Renderer.cpp

@@ -81,6 +81,7 @@ namespace OpenVulkano::Vulkan
 		}
 		uiRenderer.Close();
 		resourceManager.Close();
+		commands.clear();
 		context.Close();
 		scene = nullptr;
 	}

openVulkanoCpp/Vulkan/Resources/ResourceManager.cpp

@@ -114,6 +114,7 @@ namespace OpenVulkano::Vulkan
 		}
 		descriptorSetLayoutCache.clear();
 		shaders.clear();
+		frameResources = {};
 		memPool.Close();
 		device = nullptr;
 	}

openVulkanoCpp/Vulkan/UiRenderer.cpp

@@ -85,6 +85,7 @@ namespace OpenVulkano::Vulkan
 #endif
 		ImGui_ImplVulkan_Shutdown();
 		device.destroy(descriptorPool);
+		uiRenderPass.Close();
 	}
 
 	void UiRenderer::BeginUiFrame() const