changed: Cosmetics
fixed: We should only try to extract/show thumbs/flags for file-like items (fixes #14176)
fixed: Auto flags didn't work for items without a VideoInfoTag
changed: Improve logic in GetStreamDetails() for items without a (complete) VideoInfoTag
changed: Only try to get streamdetails when we have no infotag or no streamdetails already
fixed: Setting streamdetails for auto thumbs/flags didn't work for items with incomplete/empty infotags