Fills the indicator picker with every indicator of mfi (on the server,
as the list is long) and draws plot_bar() for the chosen indicator,
number of countries and country to follow.
Arguments
- id
Character. Module namespace id, must match the id used in
mod_bar_ui().- mfi
Data frame of World Bank indicator values (long format, with
Indicator Name,Country Name,Year,valuecolumns).