Require Inno Setup v5.5.4 for the WIndows 8.1 support.
DVB: Move channel list to the new section in settings.
DSUtil: Cosmetics.
Avoid the OSD flashing when skipping to a chapter.

The OSD displayed the seek message before it was immediately replaced by the chapter information.
Use elapsed/remaining time for the chapter change OSD depending on what is selected.

This commit fixes #1555.