Fixed: Added old ticket information to ticket_history (bug#10027).
Merge branch 'rel-3_3' of git.otrs.com:otrs/otrs into rel-3_3

Conflicts:
	CHANGES.md
Fixed: Subject always cleaned from prefixes, irrespective of configuration (bug#10023).
Fixed bug#10020 - Event Information within Events Ticket Calender has wrong translation.
date values are 'value_date', not 'Date'. On SQL Server, milliseconds were actually NOT cut off.
Fixed: Timestamps in HistoricalValueGet return milliseconds on SQL Server (bug#9999).
Fixed tests.
Fixed bug#10028 - Duplicate Access Keys/hardcoded assignments.
Fixed: After empty ticket list, Column Filters are reset in Overview Small screens. (bug#9997).
Fixed: Reset filters in small overviews does not reset the ticket list (bug#10036).