Checkmk Werk 13233: BI: Fix missing comment fields, add show more mode

ID: 13233 Title: BI: Fix missing comment fields, add show more mode Component: BI Level: 1 Class: Bug fix Version: 2.1.0i1 The pages for editing BI packs and aggregations had no comment field. This was now added as "Show more" field. The comment field for BI rules is now also only visible if show more is active. All comment fields were also added to the REST-API.