gluon-config-mode-mesh-vpn: override Section:write() instead of Section:handle()

package/gluon-config-mode-mesh-vpn/luasrc/lib/gluon/config-mode/wizard/0300-mesh-vpn.lua

@@ -58,8 +58,7 @@ return function(form, uci)
 		uci:set("gluon", "mesh_vpn", "limit_egress", data * 1000)
 	end
 
-	function s:handle()
-		Section.handle(s)
+	function s:write()
 		uci:save('gluon')
 		os.execute('exec /lib/gluon/mesh-vpn/update-config')
 	end