forms: Render Instructions

This addresses issue 4493 where the system renders form instructions as
plain text instead of HTML. The data is saved in the db as encoded HTML and
upon pulling the data we do not decode it back to HTML for rendering.

scp/forms.php

@@ -8,6 +8,7 @@ if($_REQUEST['id'] && !($form=DynamicForm::lookup($_REQUEST['id'])))
 
 if($_POST) {
     $_POST = Format::htmlchars($_POST, true);
+    $_POST['instructions'] = Format::htmldecode($_POST['instructions']);
     $fields = array('title', 'notes', 'instructions');
     $required = array('title');
     $max_sort = 0;