6.17: Dropdowns Auto close example
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**Primary Actor**: User

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

**Goal**: Show user example how to use autoClose property for dropdown behaviour

Main success scenario:
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1. User opens Dropdowns demo page
2. User clicks on Auto close sub-menu
3. User see 2 clickable buttons "Button dropdown"
4. When user clicks on the first "Button dropdown", then dropdown opened and there are 3 items inside
5. When user press "ESC", then this dropdown closes
6. When user clicks on the first "Button dropdown" again, then dropdown opened and there are 3 items inside
7. When user clicks outside dropdown, then this dropdown closes
8. When user clicks on the second "Button dropdown", then dropdown opened and there are 3 items inside
9. When user press "ESC", nothing happens
10. When user clicks outside dropdown, nothing happens
11. When user clicks on the second "Button dropdown" again, then dropdown closed

Variations:
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2*. User scroll to Auto close sub-menu