DialogVideoInfo: do not reset the current listitem before play

[enen92]

Description

When listitems are played via the VideoInfo dialog the current ListItem is reset and a new CFileItem is created using the previous ListItem VideoInfoTag. In case the previous item did not have an infotag, the new CFileItem path is set to the older listitem path while the remaining listitem information is lost/recreated. The option to play from beginning or resume the playback for an item takes into account the fact of the item being a folder (m_bisFolder) which by default is set to true. Resume options only are displayed if the item is not a folder.

When adding plugin directories we have the option to specify if the listitem is a folder. Playable items are added by defining the isPlayable property to true and setting isFolder to false. Since the isFolder info is lost when we play from the video info dialog, the video is always played from the beginning. Different behaviour happens when playing from the the regular plugin window containing the item list.

Motivation and Context

Fixes #15581

How Has This Been Tested?

Played several items from the video info dialog:

• movies
• tvshow episodes
• plugins
• movies or episodes in playlists

Checked the old behaviour was retained for all the items but for plugins we now get the option to resume playback.

Screenshots (if appropriate):

Types of change

• Bug fix (non-breaking change which fixes an issue)
• Clean up (non-breaking change which removes non-working, unmaintained functionality)
• Improvement (non-breaking change which improves existing functionality)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that will cause existing functionality to change)
• Cosmetic change (non-breaking change that doesn't touch code)
• None of the above (please explain below)

[enen92]

jenkins build this please

[enen92]

Any objections / can somebody review? PR was first created 2 months ago.
Maybe let it in and see if any issues are found?