Remove Views contextual filter UI elements from Block Configuration

[mrkmiller]

Add config settings to the sitefarm_core.settings.php file for the context keys that should be hidden on blocks created by views.

// Remove Views contextual filter UI elements from Block Configuration
  if ($form_id == 'block_form' && !empty($form['settings']['context_mapping'])) {
    $context_keys = [
      'nid',
      'nid_1',
      'tid',
      'field_sf_gallery_category_target_id',
    ];
    foreach ($context_keys as $key) {
      if (array_key_exists($key, $form['settings']['context_mapping'])) {
        $form['settings']['context_mapping'][$key]['#access'] = FALSE;
      }
    }
  }

[mrkmiller]

Duplicate of #96