Refactor dashboard -> block_manager since it'll manage blocks site

wide, not just in the dashboard.

modules/comment/helpers/comment_block.php

@@ -17,12 +17,12 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA  02110-1301, USA.
  */
-class comment_dashboard_Core {
+class comment_block_Core {
   static function get_list() {
     return array("recent_comments" => t("Recent Comments"));
   }
 
-  static function get_block($block_id) {
+  static function get($block_id) {
     $block = new Block();
     switch ($block_id) {
     case "recent_comments":

modules/comment/helpers/comment_installer.php

@@ -50,7 +50,7 @@ class comment_installer {
                  ENGINE=InnoDB DEFAULT CHARSET=utf8;");
 
 
-      dashboard::add_block("main", "comment", "recent_comments");
+      block_manager::add("dashboard_center", "comment", "recent_comments");
       module::set_var("comment", "spam_caught", 0);
       module::set_version("comment", 1);
     }