fix(datepicker): remove position fixed (#3610)
fix(datepicker): remove position fixed (#3610)

fixes #3300 

* fix(datepicker): remove position fixed

* fix(datepicker): hide datepicker on scroll

* fix(datepicker): add demo with scroll action

* fix(datepicker): change position for datepicker

* fix(datepicker): add modefied files after update

valor-software/ngx-bootstrap,valor-software/ngx-bootstrap,valor-software/ngx-bootstrap,valor-software/ng2-bootstrap,valor-software/ngx-bootstrap,valor-software/ng2-bootstrap