Add proper mdi container method which checks duped names

Switch_Toolbox_Library/GUI.cs

@@ -65,10 +65,9 @@ namespace Switch_Toolbox.Library
         }
         public void CreateMdiWindow(STForm form, bool Show = true)
         {
-            form.MdiParent = Application.OpenForms[0];
+            var mainform = Application.OpenForms[0];
 
-            if (Show)
+            ((IMdiContainer)mainform).AddChildContainer(form);
-                form.Show();
         }
         public ObjectEditor GetObjectEditor()
         {

Switch_Toolbox_Library/Interfaces/IMdiContainer.cs

@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+
+namespace Switch_Toolbox.Library
+{
+    public interface IMdiContainer
+    {
+        void AddChildContainer(Form form);
+    }
+}

Switch_Toolbox_Library/Switch_Toolbox_Library.csproj

@@ -498,6 +498,7 @@
     <Compile Include="Helpers\TextureHelper.cs" />
     <Compile Include="Interfaces\IEditor.cs" />
     <Compile Include="Interfaces\IFIleEditor.cs" />
+    <Compile Include="Interfaces\IMdiContainer.cs" />
     <Compile Include="Interfaces\IMenuExtension.cs" />
     <Compile Include="Interfaces\ITexture.cs" />
     <Compile Include="Interfaces\IViewportContainer.cs" />

Toolbox/MainForm.cs

@@ -18,7 +18,7 @@ using OpenTK.Graphics.OpenGL;
 
 namespace Toolbox
 {
-    public partial class MainForm : Form
+    public partial class MainForm : Form, IMdiContainer
     {
         private static MainForm _instance;
         public static MainForm Instance { get { return _instance == null ? _instance = new MainForm() : _instance; } }
@@ -26,8 +26,17 @@ namespace Toolbox
         IFileFormat[] SupportedFormats;
         IFileMenuExtension[] FileMenuExtensions;
 
+        public void AddChildContainer(Form form)
+        {
+            TabDupeIndex = 0;
+            form.Text = CheckTabDupes(form.Text);
+            form.MdiParent = this;
+            form.Show();
+        }
+
         public MainForm()
         {
+
             FormThemes.ActivePreset = FormThemes.Preset.Dark;
 
             Runtime.MainForm = this;