Adds a "visible" option on User and Project custom fields (#1738).

If set to false, the custom field won't be display on user profile/project overview.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@4382 e93f8b46-1217-0410-a6f0-8f06a7374b81

db/migrate/20101107130441_add_custom_fields_visible.rb

@@ -0,0 +1,9 @@
+class AddCustomFieldsVisible < ActiveRecord::Migration
+  def self.up
+    add_column :custom_fields, :visible, :boolean, :null => false, :default => true
+  end
+
+  def self.down
+    remove_column :custom_fields, :visible
+  end
+end