MainFrame: fix snapping to desktop edges

Refs #4116
Treat tooltips as part of parent root window

Fixes #4128
DVB: Don't update stats when channel is not active.
DVB: Show current event time in the status bar
DVB: Make use out of the DVBState struct.
Mpeg2SectionData: Minor refactioring of the ParseEIT() method
DVB: Cosmetic for SetChannel()
Cosmetics for timers.
Cosmetics for stats.
DVB: Fix time calculations

StartTime was day off in certain cases.
DVB: Add channel name to snapshot filename
DVB: Add only supported services.
DVB: Add context menu to navigation dialog.

Use std::vector to store channel in order to get better sort abilities.
DVB: Use proper media types.

Resolves ugly audio pops and cracks for EAC3.
Add advanced settings page.