Ngx-bootstrap: docs(dropdown): dropdowns placement doesn't affect anything if dropdown is shown inline

[irudyi-carecloud]

Bug description or feature request:

Placement of a popover doesn't work when it is set to "top"

Plunker/StackBlitz that reproduces the issue:

https://valor-software.com/ngx-bootstrap/#/dropdowns#triggers-manual

Versions of ngx-bootstrap, Angular, and Bootstrap:

ngx-bootstrap: latest

Angular: 4

Bootstrap: 4

Build system: Angular CLI, System.js, webpack, starter seed:

[IlyaSurmay]

placement doesn't affect anything if dropdown is shown inline (without container="body"). We'll add this info in docs, thanks!

[bhaskerchari]

placement doesn't seem to effect anything even if dropdown is not shown inline (with container="body" is set).