MDL-56345 assignfeedback_editpdf: Use correct strings for tool alt text

mod/assign/feedback/editpdf/classes/renderer.php

@@ -75,7 +75,7 @@ class assignfeedback_editpdf_renderer extends plugin_renderer_base {
 
         // Build button alt text.
         $alttext = new stdClass();
-        $alttext->tool = $tool;
+        $alttext->tool = get_string($tool, 'assignfeedback_editpdf');
         if (!empty($accesskey)) {
             $alttext->shortcut = '(Alt/Shift-Alt/Ctrl-Option + ' . $accesskey . ')';
         } else {

mod/assign/feedback/editpdf/lang/en/assignfeedback_editpdf.php

@@ -42,6 +42,7 @@ $string['deletecomment'] = 'Delete comment';
 $string['deletefeedback'] = 'Delete feedback PDF';
 $string['downloadablefilename'] = 'feedback.pdf';
 $string['downloadfeedback'] = 'Download feedback PDF';
+$string['drag'] = 'Drag';
 $string['errorgenerateimage'] = 'Error generating image with ghostscript, debugging info: {$a}';
 $string['editpdf'] = 'Annotate PDF';
 $string['editpdf_help'] = 'Annotate students submissions directly in the browser and produce an edited downloadable PDF.';