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
DVB signal strength indicator: Replace F abbreviation by S.

F was used for "Force" which is French for "Strength"
Translation scripts: Faster backup step.

Skip verify after copy, the speed penalty is really big and this backup isn't critical.

Also fix the backup of the main RC after 051a39a5deb63c1507cf0a2d305e8fc2eeb26ee3.
build.bat: Compilation failed if MSYS or MinGW paths contained a space.
Output page: Remove an old always overriden tooltip.