0.6: Accordion dynamic example
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**Primary Actor**: User

**Scope**: Ngx-bootstrap DEMO / BS version 3&4

**Goal**: Show user possibilities to dynamic adding new items

Main success scenario:
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1. User open Accordion demo page
2. User click on Dynamic accordion sub-menu
3. User able to click on each item of 2
4. When user click on "Add Group Item" button then new item added
5. User able to click on just added new item and see the content inside
6. After reloading page, amount of items in Accordion dynamic block should be 2

Variations:
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2*. User scroll to Dynamic accordion sub-menu