2-4 Trees occasionally leave blank/extra spaces in nodes after changing 2nd/3rd data promotion or pred/succ remove

[grant-hollosi]

https://user-images.githubusercontent.com/64664063/151191024-bd0941e8-ac29-47e8-ad72-439946927b17.mov

This issue seems to be fairly difficult to duplicate, but could be related to how data is stored in the 2-4 tree after switching the radio buttons or skipping back.

[luciankt]

@jacksherling could investigate if this bug still exists perhaps