fix(datepicker): fix navigation buttons in datepicker styles (#6171)
fix(datepicker): fix navigation buttons in datepicker styles (#6171)

* fix(datepicker): fix navigation buttons in datepicker styles

* fix(datepicker): move styles

* fix(datepicker): delete unuseful styles
valor-software/ngx-bootstrap,valor-software/ngx-bootstrap,valor-software/ngx-bootstrap,valor-software/ng2-bootstrap,valor-software/ng2-bootstrap,valor-software/ngx-bootstrap