Table is messed up when inserting a row, column and cell when a table has a header

[clazy]

when inserting a row/column/cell to the child table using the context menu, it will insert the row/column/cell on the parent table.

step to reproduce:

1. add a table(parent table) without header
2. add another table(child table) with header inside the parent table
3. right click on the first cell of the child table and insert a row/column/cell

expected : row/column/cell will insert in the child table actual : row/column/cell added on the parent table

for more detail, video is attached