* fix: style dropdown bootstrap4/5

* fix: appareance with input-group class

* feat: add ignoreOnDropdownHeight property

* fix: calcul dropdownheight with optgroup

* fix: style for input-group class

* fix: add separator height to dropdown height calcul

* feat: add option 'search'

* test: add test for normalize/search options

* fix: different style for select/active option

* fix: persitant state style for selected item

* fix: peristant style for selected option

* fix: prevent the keyboard on mobile devices