Keep references to Images used by ImGui

GlitchyEngine/src/ImGui/ImGuiExtension.bf

@@ -20,5 +20,8 @@ namespace ImGui
 		public static extern void Image(Texture2D texture, Vec2 size, Vec2 uv0 = Vec2.Zero, Vec2 uv1 = Vec2.Ones, Vec4 tint_col = Vec4.Ones, Vec4 border_col = Vec4.Zero);
 		// Wouldn't be necesseary if RenderTarget2D was Texture2D
 		public static extern void Image(RenderTarget2D texture, Vec2 size, Vec2 uv0 = Vec2.Zero, Vec2 uv1 = Vec2.Ones, Vec4 tint_col = Vec4.Ones, Vec4 border_col = Vec4.Zero);
+
+		/// Releases references that accumulated calls like ImGui::Image
+		protected internal static extern void CleanupFrame();
 	}
 }

GlitchyEngine/src/ImGui/ImGuiLayer.bf

@@ -2,6 +2,8 @@ using System;
 using ImGui;
 using GlitchyEngine.Events;
 
+using internal ImGui;
+
 namespace GlitchyEngine.ImGui
 {
 	public class ImGuiLayer : Layer
@@ -207,6 +209,8 @@ namespace GlitchyEngine.ImGui
 			ImGui.Render();
 			ImGuiImplDX11.RenderDrawData(ImGui.GetDrawData());
 
+			ImGui.CleanupFrame();
+
 			if(io.ConfigFlags.HasFlag(.ViewportsEnable))
 			{
 				ImGui.UpdatePlatformWindows();