alignment of checkbox editor in TableView

[anton dos santos]

Hi
in a TableView, TableViewBooleanCellRenderer is centered in its column, but a checkbox (as editor) 
is left aligned.
I'd like to have the editors aligned to the renderers
See attached picture where first row is edited and second row is not.
I tried to change the style of the checkbox, but there is no 
horizontalAlignment style on Checkbox.
my bxml code is :
....
<TableView.Column name="doneArLinks" width="30" headerData="%doneArLinks" >
<cellRenderer>
<content:TableViewBooleanCellRenderer/>
</cellRenderer>
</columns>
<rowEditor>
<content:TableViewRowEditor editEffect="horizontal_slide">
<cellEditors>
<doneArLinks>
<Checkbox selectedKey="doneArLinks" />
</doneArLinks>
....

How can I make my checkbox editors centered like the renderers ?

Thanks
Anton
<<attachment: Screenshot.png>>