fix openbox icon path

Author: aptalca

root/defaults/menu.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <openbox_menu xmlns="http://openbox.org/3.4/menu">
 <menu id="root-menu" label="MENU">
-<item label="Yaak" icon="/usr/share/icons/hicolor/256x256/apps/yaak-app.png"><action name="Execute"><command>/usr/bin/yaak-app</command></action></item>
+<item label="Yaak" icon="/usr/share/icons/hicolor/256x256@2/apps/yaak-app.png"><action name="Execute"><command>/usr/bin/yaak-app</command></action></item>
 <item label="xterm" icon="/usr/share/pixmaps/xterm-color_48x48.xpm"><action name="Execute"><command>/usr/bin/xterm</command></action></item>
 </menu>
 </openbox_menu>