Not sure if this is the better approach, but this gives the
application window dispatch function access to the now private
timer implementation, so nobody else can call them.

Change-Id: Ic361d2c93116fbd6c85b20f7da3cffbd538b3558
Reviewed-on: https://gerrit.libreoffice.org/43041Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Jan-Marek Glogowski <glogow@fbihome.de>