[add] better xpath generation, [add] wake lock, [add] device sorting,

[fix] better theme management

database/query.sql.go

@@ -401,6 +401,7 @@ SELECT
 FROM devices
 JOIN users ON users.id = devices.user_id
 WHERE users.id = ?1
+ORDER BY devices.last_synced DESC
 `
 
 type GetDevicesRow struct {