question bank: MDL-18822 Highlight the last question you edited in the list

Helpful if you need to edit a lot of questions - saves you from losing your place.
Idea and patch by Oleg Sychev.

question/editlib.php

@@ -776,6 +776,7 @@ class question_bank_view {
     protected $extrarows;
     protected $requiredcolumns;
     protected $sort;
+    protected $lastchangedid;
     protected $countsql;
     protected $loadsql;
     protected $sqlparams;
@@ -803,6 +804,8 @@ class question_bank_view {
             $this->editquestionurl->param('courseid', $this->course->id);
         }
 
+        $this->lastchangedid = optional_param('lastchanged',0,PARAM_INT);
+
         $this->init_column_types();
         $this->init_columns($this->wanted_columns());
         $this->init_sort();
@@ -1340,6 +1343,9 @@ class question_bank_view {
         if ($question->hidden) {
             $classes[] = 'dimmed_text';
         }
+        if ($question->id == $this->lastchangedid) {
+            $nameclass='highlight';
+        }
         if (!empty($this->extrarows)) {
             $classes[] = 'r' . ($rowcount % 2);
         }