fix(datepicker): datepicker-popup nest in dropdown
fix(datepicker): datepicker-popup nest in dropdown

* Extend fix from commit c5fe8b to the deprecated
non uib-dropdown-menu.

Fixes #4197
Closes #4693

Lincoln-xzc/angular-ui-bootstrap,Foxandxss/bootstrap,shadowdaw/bootstrap,infowrap/bootstrap,Foxandxss/bootstrap,RobJacobs/bootstrap,benhalverson/bootstrap,vfiles/bootstrap,benhalverson/bootstrap,connyay/bootstrap,wesleycho/bootstrap,Lincoln-xzc/angular-ui-bootstrap,looker/bootstrap,byronigoe/bootstrap,justin-john/bootstrap-1,guaido79/bootstrap,caoruiy/bootstrap,fpipita/bootstrap,mabi/bootstrap,292388900/bootstrap,Kpler/bootstrap,shootermv/bootstrap,Servoy/bootstrap,shiftagent/ui-bootstrap,angular-ui/bootstrap,shootermv/bootstrap,davious/angular-ui-bootstrap,byronigoe/bootstrap,benhalverson/bootstrap,vfiles/bootstrap,christor/bootstrap,justin-john/bootstrap-1,burlhock/bootstrap,mabi/bootstrap,icfantv/bootstrap,angular-ui/bootstrap,christor/bootstrap,looker/bootstrap,shiftagent/ui-bootstrap,davious/angular-ui-bootstrap,BookingBug/bootstrap,deeg/bootstrap,deeg/bootstrap,RobJacobs/bootstrap,infowrap/bootstrap,matteopic/bootstrap,pdsoftplan/bootstrap,benhalverson/bootstrap,caoruiy/bootstrap,matteopic/bootstrap,BookingBug/bootstrap,Servoy/bootstrap,burlhock/bootstrap,guaido79/bootstrap,connyay/bootstrap,wesleycho/bootstrap,pdsoftplan/bootstrap,292388900/bootstrap,Kpler/bootstrap,icfantv/bootstrap,shadowdaw/bootstrap,fpipita/bootstrap