Use ApplicationEvents_11 Interface

* src/application-events.cpp (BeforePrint): New value.
(END_EVENT_SINK): Use ApplactionEvents_11.
* src/oomhelp.h: Define ApplactionEvents_11 ID.

BeforePrint is not documented in MSDN but it is shown as
BeforePrint in OutlookSpys event log and it seems to
work with Ol 2016.

Needs to be tested on Ol 2010.

• GnuPG-Bug-Id: T4560