Selecting some text and clicking Insert > Info Box Macro should put the selected content in the macro content

Right now the selected content is lost (tested with XWiki 13.9).

To reproduce:

• Create a page with the following content:

  1. (((
  Hello
  
  World
  )))

• Edit in WYSIWYG and select the "World" text, click Insert > Info Box (the macro, not the style)
• Expected result:

  1. (((
  Hello
  
  {{info}}
  World
  {{/info}}
  )))

• Current result:

  1. (((
  Hello
  
  {{info}}
  Type your information message here.
  {{/info}}
  
   
  )))

• BTW note the extra new lines after the closing info box macro. They look wrong too.