Display more descriptive window title in capture mode.

Use new title also for Skype Now Playing status.

Based on Underground78's suggestions.
DVB: Add event name to the window title when available.

- Change logic when ParseEIT fails.
- Change UpdatePSI to not search for channel again.
CaptureBar: Fix panel size.
Fix NukeDownstream() for EVR-CP and Sync Renderer.

This commit fixes #720, #1807, #2625, #3161
Capture: Set default output path, if path form settings is invalid.

- Replace [time] in the filename with current timestamp.
Capture: Open capture bar automatically