launcher-application: Cut off icon suffix for consistency with mzone.
launcher-application: Cut off icon suffix for consistency with mzone.

GDesktopAppInfo used by mzone chops off file suffixes in icon names.
Follow that so icons are consistent.

Fixes: http://bugs.meego.com/show_bug.cgi?id=2790

meego-netbook-ux/meego-panel-applications,meego-netbook-ux/meego-panel-applications