ui.rc files: consistenly use <gui> instead of deprecated <kpartgui>

kig/kigpartui.rc

-<!DOCTYPE kpartgui SYSTEM "kpartgui.dtd">
-<kpartgui name="kig_part" version="10">
+<?xml version="1.0"?>
+<!DOCTYPE gui SYSTEM "kpartgui.dtd">
+<gui version="10" name="kig_part">
   <MenuBar>
     <Menu name="file">
       <text>&amp;File</text>
@@ -320,4 +321,4 @@
     <Action name="view_select_shown_rect" />
     <Action name="view_zoom_area" />
   </ToolBar>
-</kpartgui>
+</gui>

kig/kigui.rc

-<!DOCTYPE kpartgui SYSTEM "kpartgui.dtd">
-<kpartgui name="kig_shell" version="4">
+<?xml version="1.0"?>
+<!DOCTYPE gui SYSTEM "kpartgui.dtd">
+<gui version="4" name="kig_shell">
 <MenuBar>
 	<Menu name="file" noMerge="1"><text>&amp;File</text>
 		<Action name="file_new"/>
@@ -26,4 +27,4 @@
   <Separator/>
   <Merge />
 </ToolBar>
-</kpartgui>
+</gui>