added a separate core.xml file that works with the mygui layout editor

files/mygui/core_layouteditor.xml

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<MyGUI>
+    <MyGUI type="List">
+        <List file="core.skin" />
+        <List file="openmw_resources.xml" />
+        <List file="openmw.font.xml" />
+        <List file="openmw_text.skin.xml" />
+        <List file="openmw_windows.skin.xml" />
+        <List file="openmw_button.skin.xml" />
+        <List file="openmw_list.skin.xml" />
+        <List file="openmw_edit.skin.xml" />
+        <List file="openmw_box.skin.xml" />
+        <List file="openmw_progress.skin.xml" />
+        <List file="openmw_hud_energybar.skin.xml" />
+        <List file="openmw_hud_box.skin.xml" />
+        <List file="openmw_mainmenu_skin.xml" />
+        <List file="openmw_console.skin.xml" />
+        <List file="openmw_journal_skin.xml" />
+        <List file="openmw_map_window_skin.xml" />
+        <List file="openmw_dialogue_window_skin.xml" />
+        <List file="openmw_scroll_skin.xml" />
+        <List file="openmw_settings.xml" />
+    </MyGUI>
+</MyGUI>
+