Adds an issues visibility level on roles (#7412).

It can be set so that users only see their own issues (created or assigned).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@5416 e93f8b46-1217-0410-a6f0-8f06a7374b81

db/migrate/20110408103312_add_roles_issues_visibility.rb

@@ -0,0 +1,9 @@
+class AddRolesIssuesVisibility < ActiveRecord::Migration
+  def self.up
+    add_column :roles, :issues_visibility, :string, :limit => 30, :default => 'default', :null => false
+  end
+
+  def self.down
+    remove_column :roles, :issues_visibility
+  end
+end