private void InitControls()
    {
        GUILayout.BeginHorizontal();
        if (GUILayout.Button("Previous Page"))
        {
            inventoryController.SetActivePage(-1);
            OnPageChanged();
        }

        if (GUILayout.Button("+"))
        {
            inventoryController.AddPage();
            OnPageChanged();
        }
        if (GUILayout.Button("Next Page"))
        {
            inventoryController.SetActivePage(1);
            OnPageChanged();
        }
        GUILayout.EndHorizontal();
        if (GUILayout.Button("Clear All"))
        {
            inventoryController.ClearPrefs();
            dragStartedInWindow = false;
            OnPageChanged();
        }
    }