Fix 9f1e45a10860dd23239de35673643e9e0e4a74f8
[videodb] Don't remove TV shows with no episodes.

That's not configurable and this shouldn't be the default behavior.
[settings] Promote hideemptyseries to GUI setting.

This promotes videolibrary.hideemptyseries from an advanced setting to a GUI
one.  This is enabled by default.
Fix 07fb4f0a82c1688e8229d78635213dd4f2efdb5a.

Breaks building with 2.1.4.
Fix "Current fanart" not being shown in DialogVideoInfo.

I'm not sure why and I didn't investigate further, but a combination of early
unpacking the fanart and accessing the CFileItemPtr in place of the CFileItem
fixes the issue.