bug: deleting table row when editing studyset can delete wrong row and/or table header

[ehanahamed]

Description
Deleting a table row when editing a studyset can delete the wrong row and/or the table header row. Deleting a table row usually works and deletes the correct row, but sometimes removes the wrong one.

Explain the steps to recreate/see the bug or where to find the problem

If applicable, mention what devices or browsers this problem happens on