15.5: Tooltip Custom content template example
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**Primary Actor**: User

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

**Goal**: Show user how to provide template refs as a content for tooltip

Main success scenario:
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1. User opens Tooltip demo page
2. User clicks on Custom content template sub-menu
3. User see button "TemplateRef binding"
4. When user hover on "TemplateRef binding", then tooltip-container shown on the top of button with specific text
5. When user moves the mouse cursor away of tooltip-button, then tooltip-container disappeared
6. Template src should be written with ng-template and \[tooltip]=param

Variations:
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2*. User scroll to Custom content template sub-menu