Issues with the header of the tables

[albertoramosmoinsendi]

While working on the migration from version 11 to version 15 of plate we have found that in version 11 of plate-table there is a change from getEmptyTableNode(editor) to getEmptyTableNode(editor, { rowCount: 2, colCount: 2}) and no change until version 15, where addRow is removed for insertTableRow and addColumn for insertTableColumn.

By making these changes and testing on the playground we noticed errors within the table related to the header. The problem with the header is that we always have to set it to false when creating the inserTableRow, but we can't do the same for the columns. This way we have places where we don't want to have the header if we start adding columns and rows. This is how it worked before: https://codesandbox.io/s/sandpack-project-forked-c7m08y?file=/App.tsx and this is what it should look like:

The problem can be recreated here: https://codesandbox.io/s/sandpack-project-forked-k5nj87?file=/table/TableToolbarButtons.tsx and how the bug looks like:

It's the same TabletoolbarButtons.tsx file and the same functionality and should work the same way.