finishing dlgImgSelect dialog

fixing ok button and return of selected image.
still to check selection and some other details
Merge pull request #1 from DanCooper/1.3.0.newscraper

1.3.0.newscraper
fixing mpdb image return

fixing duplicated strings, description, size, still something wrong
there :)
fixed poster scrapers and db errors

scraping works... fixing details :)
scraping Ctrl-i fully works

fixed error on dialog cancel
fixed all sizes in Poster/Fanart scrapers
fixed error on DB due to new library
fixed IMDB / TMDB wait on cancel
Merge pull request #4 from msavazzi/1.3.0.newscraper

1.3.0.newscraper