show klipper in non-kde desktops

If running Plasma it will show in the system tray.  If not running
Plasma only then might you want to show it in the menu.

Differential Revision: https://phabricator.kde.org/D1537

klipper/org.kde.klipper.desktop

@@ -186,7 +186,7 @@ X-DBUS-StartupType=Unique
 X-DBUS-ServiceName=org.kde.klipper
 X-KDE-UniqueApplet=true
 X-KDE-autostart-condition=klipperrc:General:AutoStart:false
-OnlyShowIn=KDE;
+NotShowIn=KDE;
 Categories=Qt;KDE;Utility;X-KDE-Utilities-Desktop;
 Comment=A cut & paste history utility
 Comment[af]='n Knip & plak geskiedenis program