feat(popover): add functionality of displaying popoverTitle as HTML

[singhrasster]

Looking at the documentation, it seems like popover can be HTML (it supports both string type and TemplateRef type:
http://valor-software.com/ngx-bootstrap/#/popover#popover-directive
It tried and it worked well for me. However, I want to display contents of popoverTitle also as HTML. Reason being that my title section is not just a plain heading but I have images and other html content I want to display there as well. Is it possible to display html content in popoverTitle? If yes, how?

[IlyaSurmay]

It's not possible for now. Maybe it will be implemented in future releases but I can't promise that :(

@singhrasster maybe it will help you https://stackblitz.com/edit/ngx-bootstrap-xgyqab?embed=1&file=app/app.component.html