run_demo runs demo shiny app which logs different types of events.
run_demo_dashboard runs demo shiny dashboard that allows
for interactive analysis of events from demo app.
The demo app can be also run in background and events fired in the app
can be seen immediately in the demo dashboard.
run_demo(in_background = FALSE)
If TRUE the demo shiny app is run in the background on port 5555.
Default is FALSE.