fix(datepicker): fix 'outsideDays' clicks for multiple months
fix(datepicker): fix 'outsideDays' clicks for multiple months

Fixes an issue when datepicker popup was closed when using [autoClose]='outside' and clicking on outside days with multiple months opened

Fixes #2879

maxokorokov/core,ng-bootstrap/ng-bootstrap,ng-bootstrap/core,maxokorokov/core,jnizet/ng-bootstrap,maxokorokov/core,jnizet/ng-bootstrap,fbasso/ng-bootstrap,benouat/ng-bootstrap,ng-bootstrap/ng-bootstrap,ng-bootstrap/ng-bootstrap,fbasso/ng-bootstrap,ng-bootstrap/core,fbasso/ng-bootstrap,jnizet/ng-bootstrap,jnizet/ng-bootstrap,ng-bootstrap/core,ng-bootstrap/ng-bootstrap,benouat/ng-bootstrap,benouat/ng-bootstrap,benouat/ng-bootstrap,fbasso/ng-bootstrap,maxokorokov/core