9.7: Popover Append to body example
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**Primary Actor**: User

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

**Goal**: Show user how to make popover appended to body

Main success scenario:
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1. User opens Popover demo page
2. User clicks on Append to body sub-menu
3. User see 2 clickable buttons "Default popover" and "Popover appended to body"
4. When user clicks on "Default popover", then popover-container shown on the top of button with specific text //TODO popover not visible
5. When user clicks on "Default popover" again, then popover-container disappeared
6. When user clicks on "Popover appended to body", then popover-container shown on the top of button with specific text
7. When user clicks on "Popover appended to body" again, then popover-container disappeared
8. Template src should be written with container="body"

Variations:
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2*. User scroll to Append to body sub-menu