MDL-37770 Assignment submission comments do not work without javascript.

This is mostly fixed by MDL-36832 which correctly sets the $PAGE->url.

This patch hides the submit and textareas from submission comments in the grading table when
javascript is disabled and quickgrading is enabled. This particular combination results in a form
nested in a form which does not work (and cannot be fixed in a reasonable amount of time).

mod/assign/styles.css

@@ -150,3 +150,13 @@ td.submissioneditable {
 .hidefull {
     display: none;
 }
+
+.quickgradingform form .commentscontainer input,
+.quickgradingform form .commentscontainer textarea {
+    display: none;
+}
+
+.jsenabled .quickgradingform form .commentscontainer input,
+.jsenabled .quickgradingform form .commentscontainer textarea {
+    display: inline;
+}

mod/assign/submission/comments/locallib.php

@@ -71,7 +71,8 @@ class assign_submission_comments extends assign_submission_plugin {
         $comment = new comment($options);
         $comment->set_view_permission(true);
 
-        return $comment->output(true);
+        $o = $this->assignment->get_renderer()->container($comment->output(true), 'commentscontainer');
+        return $o;
     }
 
     /**