Add support for other ids than IMDB when sharing

When clicking the share icon the resulting link to IMDb is broken, missing the tt before the imdbid and linking to wrong or nonexisting pages.

I’m currently watching: Baskets • S03E10 • New Year’s Eve (http://www.imdb.com/title/6523590) #Yatse
I’m currently watching: Nathan Barley • S01E01 • Episode 1 (http://www.imdb.com/title/306930) #Yatse
I’m currently watching: Siren (2018) • S01E04 • On the Road (http://www.imdb.com/title/6622415) #Yatse
I’m currently watching: People of Earth • S01E01 • Pilot (http://www.imdb.com/title/5696663) #Yatse

For example, the last one of those should be https://www.imdb.com/title/tt5020508

Sharing a movie works as expected, with correct movie linked to and a valid IMDb URL.