Refactor extra choice return value
Refactor extra choice return value

The `choose_candidate` function now returns the `PromptChoice` object instead
of a short letter that selects the `PromptChoice`.

beetbox/beets,Kraymer/beets,jackwilsdon/beets,artemutin/beets,diego-plan9/beets,lengtche/beets,xsteadfastx/beets,madmouser1/beets,SusannaMaria/beets,diego-plan9/beets,jackwilsdon/beets,madmouser1/beets,artemutin/beets,beetbox/beets,shamangeorge/beets,Kraymer/beets,pkess/beets,MyTunesFreeMusic/privacy-policy,shamangeorge/beets,artemutin/beets,sampsyo/beets,Kraymer/beets,shamangeorge/beets,sampsyo/beets,SusannaMaria/beets,ibmibmibm/beets,ibmibmibm/beets,pkess/beets,mosesfistos1/beetbox,xsteadfastx/beets,xsteadfastx/beets,mosesfistos1/beetbox,ibmibmibm/beets,MyTunesFreeMusic/privacy-policy,MyTunesFreeMusic/privacy-policy,jackwilsdon/beets,beetbox/beets,artemutin/beets,SusannaMaria/beets,beetbox/beets,lengtche/beets,shamangeorge/beets,SusannaMaria/beets,diego-plan9/beets,mosesfistos1/beetbox,sampsyo/beets,lengtche/beets,xsteadfastx/beets,Kraymer/beets,lengtche/beets,mosesfistos1/beetbox,madmouser1/beets,diego-plan9/beets,pkess/beets,sampsyo/beets,jackwilsdon/beets,ibmibmibm/beets,MyTunesFreeMusic/privacy-policy,madmouser1/beets,pkess/beets