6.12: Dropdowns Menu dividers example
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**Primary Actor**: User

**Scope**: Ngx-bootstrap DEMO / BS version 3&4

**Goal**: Show user example how to separate dropdown items with divider

Main success scenario:
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1. User opens Dropdowns demo page
2. User clicks on Menu dividers sub-menu
3. User see clickable button "Button dropdown"
4. When user clicks on this button, then dropdown opened and there are 4 items, one of them is separated
5. When user clicks on any item, then dropdown closes
6. Template src should be implemented with divider class

Variations:
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2*. User scroll to Menu dividers sub-menu
