More easily use service components from other congregations

[tbar0970]

Song X has been sung by evening church for some time. I'm editing the run sheet for morning church and decide we should introduce song X. Instead of having to save the run sheet, go to the component library, add song X to morning church, come back to the run sheet, it would be nice to be able to stay in the run sheet editor, click a "find a component from another congregation" button (?), search for song X, tick a "add to this congregation" box, and have the song now added to the run sheet and saved as part of this congregation's repertoire for next time.