popover-content creates 2 popovers

[Kotsiuba]

I have inserted an example from the Readme into my Angular 8 app.

<popover-content #myPopover 
                title="Popover title" 
                placement="left"
                [animation]="true" 
                [closeOnClickOutside]="true" >
    <b>Very</b> <span style="color: #C21F39">Dynamic</span> <span style="color: #00b3ee">Reusable</span>
    <b><i><span style="color: #ffc520">Popover With</span></i></b> <small>Html support</small>.
</popover-content>

But as a result, it creates 2 popovers

Valid for 1.2.0-1.40