Menutup issues yang seharusnya sudah tertutup.

fixed #21 Update jQuery ke versi terbaru.
fixed #5 [admin]Update product page (updateproduct.php)
fixed #6 [admin]Profile page (profile.php)
fixed #9 Transaction page (transaction.php)
fixed #10 [admin]Detail page (detail.php)
fixed #3 Product page (product.php)