Improved code for IgnoreLinkedTicketStateTypes setting of LinkObject.
Added notes about the mutual influencing between different sysconfig settings.
In ticket actions, if article widget is collapsed but Subject/Body are filled and NeedSpellCheck is set, expand the article widget again on submit, if NeedSpellCheck dialog is shown.
Switched selenium tests to the object manager.
Switched some ticket tests to the object manager.
Merge remote-tracking branch 'upstream/master' into otrs-master