Nouvelle version 9.2.0

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# Rev. : 9.1.2> 9.2.0
Date : October>Novembre 21
Author : admin
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#### Features
– syndication AYCP version 2 supported 9.1
– form step-by-step (9.2.0) [documentation](https://learn.zads.fr/basics/annonce#formulaire-par-etapes)

#### Enhancements
– no stock on some categories 9.1
– contact buttons accessible only with a subscription (9.1.1) [documentation](https://learn.zads.fr/contact#configuration-pour-contact-sur-abonnement)
– price can be enabled/disabled per user profil
– quantity (stock) can be enabled/disabled per user profil (9.2.0) [documentation](https://learn.zads.fr/basics/addisplay#widget-qr-code)
– changed QRcode library + option to activate or not

#### Changes
– some css style on some elements

#### Bugfix
– redirect after login to home page
– corected URL link on emails when paid user subscritpion
– instant messaging – error 500 in some situations (9.1.2)