I've had a look at both the default files from FM22 and FM23 and there isn't much difference except for the addition of headings in the FM23 file. I think it is controlled by a table code which is listed below and is the same in both FM22 & FM23 default files.
<widget class="table" mode="fill_rows, stripe_rows" id="tabl" layout="-1, -1" auto_size_rows="false" row_height="22" save_session_state="true" save_default_state="true">
<list id="column_widget_properties">
<record indx="0" alignment="left,centre_y"/>
</list>
<list id="column_table_properties">
<record indx="0" left="4" sort_disabled="true"/>
<record indx="1" top="6" bottom="6" right="4" sort_disabled="true"/>
</list>
</widget>