Bring up, down, top, and bottom icons into XDG compliance

diff --git a/kmahjongg/Editor.cpp b/kmahjongg/Editor.cpp
index 844eb74..8112dbb 100644
--- a/kmahjongg/Editor.cpp
+++ b/kmahjongg/Editor.cpp
@@ -156,9 +156,9 @@
     topToolbar->insertSeparator();
     topToolbar->insertButton(loader->loadIcon("back", TDEIcon::Toolbar),
             ID_TOOL_LEFT, true, i18n("Shift left"));
-    topToolbar->insertButton(loader->loadIcon("up", TDEIcon::Toolbar),
+    topToolbar->insertButton(loader->loadIcon("go-up", TDEIcon::Toolbar),
             ID_TOOL_UP, true, i18n("Shift up"));
-    topToolbar->insertButton(loader->loadIcon("down", TDEIcon::Toolbar),
+    topToolbar->insertButton(loader->loadIcon("go-down", TDEIcon::Toolbar),
             ID_TOOL_DOWN, true, i18n("Shift down"));
     topToolbar->insertButton(loader->loadIcon("forward", TDEIcon::Toolbar),
             ID_TOOL_RIGHT, true, i18n("Shift right"));