[Typo3] show FlexContent in Wizard

[Gregory BECKER]

Hello everyone,

Is there a way to show existing FlexContents in add content wizard ?
There's only a header named 'Flex Content' but nothing selectable.

I know I can select any element first then select a flexcontent when 
editing content but it would be very great to select it directly from 
the wizard. Any idea ? Where can I look for a solution ?

Thanks

Greg