MDL-8922: Had to modify another bunch of files to fix a simple problem:

when a config block contains a form, the previous form needs to be closed
properly (it was, but there were non-matching closing divs etc...).

lib/blocklib.php

@@ -456,7 +456,7 @@ function blocks_execute_action($page, &$pageblocks, $blockaction, $instanceorid,
             if ($blockobject === false) {
                 break;
             }
-
+            
             // First of all check to see if the block wants to be edited
             if(!$blockobject->user_can_edit()) {
                 break;