added: "GetFilenameList.Movie" class

Needs movie filepath, isSingle (true/false) and image type.
Returns a list of all movie filepaths for NFO, poster, fanart, trailer
etc.
We can use to generate save paths and scan paths.
changed/added: scraper & Edit Movie use new class

- scrapers use new GetFilename.Movie class
- trailer select return only a URL, download starts while Edit Movie
window closing (like images/NFO)
- copy/move local trailer create a temp. trailer in Temp folder to copy
trailer while Edit Movie window closing

Attention / TODO:
- Trailer handling works, but I have not finished the whole handling
(delete existing trailers is not perfect, but i'm working on that).
- Actor thumbs, Extrathumbs and Extrafanarts are not finished
- "Protect BDMV Structures" is not implemented atm (sorry Cocotus)
- no tips/help strings
added: more Enums for forthcoming imagetypes