Add action confirmation dialog

app/helpers/application_helper.rb

@@ -87,6 +87,9 @@ module ApplicationHelper
 
     name = svg_tag("pictograms/#{image}") + name if image
     html_options[:class] = class_names(html_options[:class], "button", active: current == :active)
+    if html_options[:confirm]
+      html_options[:onclick] = "return confirm('#{html_options.delete(:confirm)}');"
+    end
 
     send "#{type}_to", name, options, html_options
   end