Add a way to restart workflow from prepare_report rule

main.R

@@ -703,6 +703,7 @@ generate_menu <- function() {
   for(step in APP$pages[2:length(APP$pages)]){ # all steps but remove global_params page
     choices <- choices + ",'" + step$label + "'='" + step$name + "'"
   }
+  choices <- choices + ",'prepare_report'='prepare_report'"
   choices <- choices + ",'MultiQC'='multiqc'"
   res <- res + 'selectInput("force_from", label = "Start again from a step : ", selected = "none", choices = '+choices+')),'