wmmenugen: Use 'Other' instead of 'Applications' for unknown categories.

From https://standards.freedesktop.org/menu-spec/latest/apa.html:

 Category-based menus based on the Main Categories listed in this
 specification do not provide a complete ontology for all available
 applications. Category-based menu implementations SHOULD therefore provide
 a "catch-all" submenu for applications that cannot be appropriately placed
 elsewhere.

Emphasis on *submenu*.  By using 'Applications', these menu entries were
sorted into the top level.

util/wmmenugen_parse_xdg.c

@@ -554,7 +554,7 @@ static void  getMenuHierarchyFor(char **xdgmenuspec)
 
 
 	if (!*buf)		/* come up with something if nothing found */
-		snprintf(buf, sizeof(buf), "%s", _("Applications"));
+		snprintf(buf, sizeof(buf), "%s", _("Other"));
 
 	*xdgmenuspec = wstrdup(buf);
 }