add ok? indicator for each print host

Author: Floppy

app/views/print_hosts/index.rb

@@ -10,13 +10,15 @@ def view_template
     p { t("views.print_hosts.index.description") }
     table class: "table table-striped" do
       tr do
+        th
         th { PrintHost.human_attribute_name :name }
         th { PrintHost.human_attribute_name :endpoint }
         th { PrintHost.human_attribute_name :protocol }
         th
       end
       @print_hosts.each do |print_host|
         tr do
+          td { print_host.service.ok? ? "✅" : "❌" }
           td { print_host.name }
           td { code { print_host.endpoint } }
           td { translate("print_hosts.protocols.%{protocol}" % {protocol: print_host.protocol}) }