Tail call optimiziations

[Chadtech]

@jfmengels did some tail call optimizing on a few functions a wall back (Thanks @jfmengels ). He noted that with this command:

npx elm-review --template jfmengels/elm-review-performance/example --rules NoUnoptimizedRecursion

many more could be fixed. I ran it myself a while back and found ~10 functions that could be optimized.

It would be cool to go through those. Fixing them one at a time and measuring the performance gain.