fix(mespapiers): Scroll from body on Desktop

We have always had a problem with the internal scroll (paper)
of the StepperModal in Desktop mode.
In order to offer a better experience in this mode,
it is preferable that the scroll be at the level of the body.

packages/cozy-mespapiers-lib/src/components/StepperDialog/StepperDialog.jsx

@@ -42,7 +42,7 @@ const StepperDialog = ({
   const { dialogProps, dialogTitleProps, fullScreen } = useCozyDialog(rest)
 
   return (
-    <MUIDialog {...dialogProps}>
+    <MUIDialog {...dialogProps} scroll={isMobile ? 'paper' : 'body'}>
       {!fullScreen && onClose && <DialogCloseButton onClick={onClose} />}
       {onBack && <DialogBackButton onClick={onBack} />}
       <DialogTitle