Revert "Fixed bug#9060 - OTRS_CUSTOMER_BODY overwritten in Agent::Move Notifications."

This reverts commit a68079c2387bbb5692bd6ea08a2edb947905236a.

Conflicts:
	CHANGES.md
	Kernel/System/TemplateGenerator.pm
	scripts/test/TemplateGenerator/NotificationAgent.t
Fixed Use of uninitialized value at OutofOffice setting in AgentPreferences.
This fixes #9488.
Added support for storing customer user data in dynamic ticket fields
on ticket create or customer user update.
Corrected package name and add package to
list of packages to uninstall during update.
"SFTP." gets rewritten to "Shttp://FTP."
Added test case for bug#8954

http://bugs.otrs.org/show_bug.cgi?id=8954
This bug is fixed with the new email validation module used in 3.3.
Small improvement for backup.pl.
Backup all files in config directory.
Added support to recognize numbers from external ticket systems in email subject and body to create follow-up articles in existing tickets.
Added new dashboard widget that shows in a matrix form the number of tickets per state and per queue
Removed obsolete label.
Added form field for installtype.
Minor improvements to new dashboard widget.
Better use screen space.
Fixed bug#8475 - Screen refresh after action not always correct.
Added sort functionality to ticket medium and preview overviews.
Corrected log statement for creation, set log level to 'info' because 'notice' is actionable.
Fixed small overview.
Improved code consistency.
Follow-up fix for LastScreenView removal.
Improved permission checks in AgentTicketWatcher.
Fixed bug#9503 - no connection header in soap responses.
Merge remote-tracking branch 'upstream/master' into otrs-master