Update icon names
The app returns the following warning messages.
The ui.R file need to be updated.
The `name` provided ('bar-chart') is deprecated in Font Awesome 5:
* please consider using 'chart-bar' or 'fas fa-chart-bar' instead
* use the `verify_fa = FALSE` to deactivate these messages
This Font Awesome icon ('navicon') does not exist:
* if providing a custom `html_dependency` these `name` checks can
be deactivated with `verify_fa = FALSE`