[QoL Adjustment] Make Elise's rappel "ground-targetable" outside of the ability's range

How Rappel works now:

1. Casting rappel on a target instantly rappels and descends to that target.
2. Casting rappel not on a unit inside the range of the ability rappels into the air.
3. Casting rappel not on a unit outside the range of the ability has Elise walk first in order to rappel into the air.
4. Self-casting rappel behaves the same as normal cast. Changing self-cast rappel to rappel in the air would be great for fast reactions.

Elise's rappel caused a lot of confusion for me until I finally figured out exactly how her rappel worked. I'm not sure how clarity could be improved on the ability; maybe I just didn't test out the kit enough.