descriptionso one can use htmltools tags.
tab_idarguments to trigger open tabs.
highlightmethod to allow using other selectors than
#id, see #7
on_nextto step functions see #15
get_highlighted_el methods, which were partly broken and mainly inadequate, in favour of
get_previous methods. They contain all the information that was returned by the methods they deprecate and work better. They are fired when the user clicks next or previous.