Fixed bug#7518 - Escalation Notify by not working properly (follow-up fix).

Conflicts:
	CHANGES.md
Fixed bug#9286 - Ticket::ChangeOwnerToEveryone isn't functional, After a AJAX Load the setting is ignored.
Fixed bug#9387 - Error in a condition with dynamic fields in NotificationEvent.
Fixed typo.
Revert "Fixed typo."

This reverts commit 75fd9221713e3e690b5e0f125e9c01760f20297d.
Revert "Fixed bug#9387 - Error in a condition with dynamic fields in NotificationEvent."

This reverts commit 4aa5ce391d3480118efd01dc462c64a63482f2ff.
Added package verification mechanism to improve system security.
Followup fix for bug#9387 - Error in a condition with dynamic fields in NotificationEvent.
Fixed typo.
Updated translation.
Updated translation.
Added possibility to translate the headline of the intro page.
Added special translation for the package verification decription.
Updated translation.
Fixed double quoting.
Prepare for release
Typo.
Added note about package verification.
Increased TTL of a test to protect failing.
Required wording changes.