Fixed bug#10064 - Translated fields loose sorting in Activity Dialog admin screen.
Fixed bug#9109 - Printing ticket does not show the full subject line.
Fixed bug#4512 - HTMLUtils ToAscii forces line breake on fixed line-length 78.
Fixed bug#4663 - browsing article tree by 'next / down' and 'previous / up' buttons.
Fixed bug#7792 - Ticket-Action "Change Queue" is hardcoded and should be called "Queue" only.
Fixed: Owner and Responsible are mandatory if enabled (bug#10058).
Fixed: Wrong error message if Transition contains no transition actions (bug#10070).
Merge remote-tracking branch 'upstream/master'