N°9830 - Fix setup error when trying to remove class with a TagSet at…

…tribute

N°9614 - Add a specific route to display the icons for an EventNotifi…

…cationNewsroom (#911)

* N°9614 - Add a specific route to display the icons for an EventNotificationNewsroom

* N°9614 - Display the icon in EventNotificationNewsroom only for events relating to the logged-in user

* N°9614 - Refactor icon download logic in EventNotificationNewsroomService and add unit tests

* Add unit test to verify icon download functionality for users without read access

N°9549 - Fix emails with mime type different than text/plain or text/…

…html are no longer displayed correctly (#895)

* N°9549 - Fix emails with mime type different than text/plain or text/html are no longer displayed correctly

* N°9549 - Fix mime type comparisons to use the primary mime type instead of the whole string

N°8912 - Cannot work on a licence with legacy extensions including mo…

…dules without explicit version

N°7722 - Fatal error on xml injection if xml entry "redefine" doesn't…

… exist

Fix return type in PHPDoc thanks to @jbostoen

N°8139 - Fix ApplyStimulus during post update