EVR-CP: Repaint only when necessary when paused.

Additionally this seems to fix backward frame-stepping.

This commit fixes #4036.
VMROSD: Don't rely on timer to repaint OSD
Don't repaint video when angle is not changed.
Split PM_CAPTURE mode into PM_ANALOG_CAPTURE and PM_DIGITAL_CAPTURE
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.
Use GetLoadState() method instead of checking m_eMediaLoadState directly.
DVB: Fix time calculations

StartTime was day off in certain cases.
build_lavfilters.bat: Don't overwrite errorlevel.
**WIP** ISR: AutoFit