Issue #3023797 by seanB, webchick, lauriii, ckrina, phenaproxima,...

Issue #3023797 by seanB, webchick, lauriii, ckrina, phenaproxima, andrewmacpherson, rainbreaw, Gábor Hojtsy, jhodgdon, jrockowitz, worldlinemine, benjifisher: Let users choose what to do after selecting and/or adding items in the media library