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

desktop/konsoleui.rc

@@ -1,6 +1,7 @@
-<!DOCTYPE kpartgui>
+<?xml version="1.0"?>
+<!DOCTYPE gui SYSTEM "kpartgui.dtd">
 
-<kpartgui name="konsole" version="13">
+<gui name="konsole" version="13">
     <MenuBar>
         <Menu name="file"><text>File</text>
             <Action name="new-window"/>
@@ -53,4 +54,4 @@
         <Action name="split-view-left-right"/>
         <Action name="split-view-top-bottom"/>
     </ToolBar>
-</kpartgui>
+</gui>

desktop/partui.rc

@@ -1,6 +1,7 @@
-<!DOCTYPE kpartgui>
+<?xml version="1.0"?>
+<!DOCTYPE gui SYSTEM "kpartgui.dtd">
 
-<kpartgui name="konsolepart" version="13" translationDomain="konsole">
+<gui name="konsolepart" version="13" translationDomain="konsole">
     <Menu name="session-popup-menu">
         <Action name="edit_copy_contextmenu"/>
         <Action name="edit_paste"/>
@@ -26,4 +27,4 @@
         <Separator/>
         <Action name="close-session"/>
     </Menu>
-</kpartgui>
+</gui>

desktop/sessionui.rc

@@ -1,6 +1,7 @@
-<!DOCTYPE kpartgui>
+<?xml version="1.0"?>
+<!DOCTYPE gui SYSTEM "kpartgui.dtd">
 
-<kpartgui name="session" version="29">
+<gui name="session" version="29">
     <MenuBar>
         <Menu name="file">
             <Action name="file_save_as" group="session-operations"/>
@@ -67,4 +68,4 @@
         <Action name="edit_paste" />
         <Action name="edit_find" />
     </ToolBar>
-</kpartgui>
+</gui>