Macro's body gets htmlEscaped when inserted from the Macro dialog into RichText editor

[alansemenov]

See also #7840

To reproduce:

1. Install Intro app from the Market
2. Open the project in Content Studio
3. Open any content of type Person for editing
4. Set cursor inside the "Bio" field and open the Insert Macro dialog
5. Select "Fact box" macro from the list
6. Insert any HTML into the Text field, for example a list

7. Click the "Insert" button

Bug: Html from the Macro's body got HtmlEscaped and is displayed with html tags inside the "host" editor. It should've been inserted as it was in the Macro's editor. There should also be a linebreak after the opening macro's placeholder:

[macro]
<macro's html here>
[/macro]