v1.4.9

This patch brings several improvements and fixes on the notification process:

• Preventing to repeatedly send notifications that are in an error state.
• Preventing notifications to be in an error state if the pickup location is deleted.
• Cancelling generated notifications if the situation changed between the generation and the processing. Indeed, some notifications are
  asynchronous in order to be able to group several notifications of the same type to the same patron. But in the meantime, the notification
  may be outdated, because the loan has been renewed or checked in.
• Preventing to send reminders if the library is closed between the due date and the notification processing (#2303).
• Computing the date at which the due soon notification has to be sent when creating the loan, instead of through a recurring task, in order to improve performance and apply a more stable date.
• Processing due soon and overdue notifications as soon as possible, to prevent sending them after the loan is either renewed or checked in.

Several bug fixes have been added to this patch. Find the comprehensive changes in the changelog.