refactor wishlist UI / welcome page

[jackconwayiv]

• a new tab with songbooks
• uses same song search component as add song
• single input, with text input cursor
• refactor back end to conditionally filter only if songbook key is provided
• on auto-complete word wheel, show a sparkle icon if song has never had an (undeleted) song_entry (tho maybe if it was deleted, that's telling us something)
  • do this for all usages of song search component

[jackconwayiv]

• [ ] admin panel includes sort by number of song_entries

[jackconwayiv]

Move out or conditionally render recommendations in song request so they're not in the front page.

[jackconwayiv]

Add pagination to wishlist songs (and also songbooks).

[jackconwayiv]

Homepage hamburger works.