This displays a hidden Semantic UI modal.
Usage
show_modal(id, session = shiny::getDefaultReactiveDomain(), asis = TRUE)
remove_modal(id, session = shiny::getDefaultReactiveDomain(), asis = TRUE)
remove_all_modals(session = shiny::getDefaultReactiveDomain())
removeModal(session = shiny::getDefaultReactiveDomain())
hide_modal(id, session = shiny::getDefaultReactiveDomain(), asis = TRUE)