fix cd.gif for cd.png

main/exercise/exercise.php

@@ -742,7 +742,7 @@ if (!empty($exerciseList)) {
 
                     // Export
                     $actions .= Display::url(
-                        Display::return_icon('cd.gif', get_lang('CopyExercise')),
+                        Display::return_icon('cd.png', get_lang('CopyExercise')),
                         '',
                         array(
                             'onclick' => "javascript:if(!confirm('".addslashes(api_htmlentities(get_lang('AreYouSureToCopy'), ENT_QUOTES, $charset))." ".addslashes($row['title'])."?"."')) return false;",

main/exercise/question_pool.php

@@ -912,7 +912,7 @@ function get_action_icon_for_question(
 		case "clone":
             $url = api_get_self()."?".api_get_cidreq().$getParams."&question_copy=$in_questionid&course_id=$in_selected_course&fromExercise=$from_exercise";
             $res = Display::url(
-                Display::return_icon('cd.gif', get_lang('ReUseACopyInCurrentTest')),
+                Display::return_icon('cd.png', get_lang('ReUseACopyInCurrentTest')),
                 $url
             );
 			break;

main/lp/lp_list.php

@@ -614,7 +614,7 @@ foreach ($categories as $item) {
                 if ($details['lp_type'] == 1) {
                     $dsp_disk = Display::url(
                         Display::return_icon(
-                            'cd.gif',
+                            'cd.png',
                             get_lang('Export'),
                             array(),
                             ICON_SIZE_SMALL
@@ -625,7 +625,7 @@ foreach ($categories as $item) {
                 } elseif ($details['lp_type'] == 2) {
                     $dsp_disk = Display::url(
                         Display::return_icon(
-                            'cd.gif',
+                            'cd.png',
                             get_lang('Export'),
                             array(),
                             ICON_SIZE_SMALL
@@ -634,7 +634,7 @@ foreach ($categories as $item) {
                     );
                 } else {
                     $dsp_disk = Display::return_icon(
-                        'cd_gray.gif',
+                        'cd_na.png',
                         get_lang('Export'),
                         array(),
                         ICON_SIZE_SMALL