Revert "Refs #10223 Add new rows after the current selection"

Commit 5a16d93c breaks some unit tests and it's too late in the day to
repair them now.

This reverts commit 5a16d93cf6e4c6a0416dcd06e92e3d7546d7286b.
Refs #10223 Fix warnings in Refl UI test
Merge branch 'feature/10223_new_refl_ui_improvements' into develop