shiny-demo: set autoreload flag

Change-Id: Ia841776ce67fbabfe106f2285d3a5948ac0ea230
diff --git a/demo/shiny-apps/frequency_curves/ui.R b/demo/shiny-apps/frequency_curves/ui.R
index 7e1c300..82fe9c2 100644
--- a/demo/shiny-apps/frequency_curves/ui.R
+++ b/demo/shiny-apps/frequency_curves/ui.R
@@ -5,6 +5,7 @@
 library(stringr)
 library(idsThemeR)
 #source("theme-ids-dark.R")
+options(shiny.autoreload = TRUE)
 
 shinyUI(
   fluidPage(