- this was issue , broken by 27a02292
fixes #1556

fixes #1689

(Positioning.position): element.getBoundingClientRect() returns a read-only value, so don't assign it directly to a variable whose properties are subsequently modified.

fixed #1629
* fixed duplicate tab issue

* removed automatic reselection of tabs if tab is destroyed

* added tests for remove tab

* added viewvchild to be able to call method

* added detect changes call to fix unittests

* fix(tabs): remove tab-content node if tab is destroyed

* fix(tabs): fix ngIf error and change docs

close #1908
* Added id parameter in tab directive

* docs(tab): add docs for ID parameter

Twitter bootstrap (and so ngx-boostrap) doesn't officialy support nested modals.
You can however display nested modal but at least one issue appears:
At first modal you close, scroll events and scrollbar go back to the page, so
you can't scroll modals that are still displayed.

I propose to improve it with following modifications in modal component:
- at show, check if 'modal open' class is already attached to document body and
  set `isNested` boolean accordingly
- at hide, if nested, do not remove 'modal open' class and do not reset
  scrollbar.

Related to:
valor-software/ngx-bootstrap#896
valor-software/ngx-bootstrap#1691

* chore(package): update dependencies

* docs(readme): add Greenkeeper badge

* chore(package): update cli to 1.0.4, fix code coverage build process

* chore(changelog) changelog nested list fix (#1943)

* wip

* chore(package): update cli to 1.0.6

* chore(package): updated ngm-cli version

* Add output emiters

* fix(dropdown): remove unnecessary event binding and method

`dismissibleChange` is used with `.subscribe((dismissible: boolean) => { ... })` but declared as `EventEmitter<string>`

The previous example code resulted in broken widget, the fixed code is taken directly from http://valor-software.com/ngx-bootstrap/#/dropdowns#single-button

read more: https://github.com/valor-software/ngx-bootstrap/issues/1885
refs #1885