Group the desktop file into the Utilities folder in the GNOME
shell application overview.

diff --git a/xterm.desktop b/xterm.desktop
--- a/xterm.desktop
+++ b/xterm.desktop
@@ -34,9 +34,9 @@
 Name=XTerm
 #GenericName=Terminal
 Comment=standard terminal emulator for the X window system
 Exec=xterm
 Terminal=false
 Type=Application
 Encoding=UTF-8
 Icon=terminal
-Categories=System;TerminalEmulator;
+Categories=System;TerminalEmulator;X-GNOME-Utilities;