Move project_last_activity to ProjectsHelper

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/helpers/application_helper.rb

@@ -136,14 +136,6 @@ module ApplicationHelper
     Digest::SHA1.hexdigest string
   end
 
-  def project_last_activity(project)
-    if project.last_activity_at
-      time_ago_with_tooltip(project.last_activity_at, 'bottom', 'last_activity_time_ago') + " ago"
-    else
-      "Never"
-    end
-  end
-
   def authbutton(provider, size = 64)
     file_name = "#{provider.to_s.split('_').first}_#{size}.png"
     image_tag("authbuttons/#{file_name}",

app/helpers/projects_helper.rb

@@ -187,4 +187,12 @@ module ProjectsHelper
   def default_clone_protocol
     current_user ? "ssh" : "http"
   end
+
+  def project_last_activity(project)
+    if project.last_activity_at
+      time_ago_with_tooltip(project.last_activity_at, 'bottom', 'last_activity_time_ago') + " ago"
+    else
+      "Never"
+    end
+  end
 end