Review comment 2

1. configure = admin/config/development/content_type_settings

There is no use of this in Info file, so can we remove it?

2. Can we remove blank space after below lines:

'access arguments' => array('custom content type dashboard'),
'access callback' => 'user_access',
'file' => 'inc/content_dashboard.inc',

3. $form['quick_filter']['Value'] = array(
contentdashboard.inc (Value is added in caps, it should be value)

4. All the private function name should start with module name
eg._get_data function name should be _content_dashboard_get_data