Bug 26291: (follow-up) Correct stray MSG instances

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>

koha-tmpl/intranet-tmpl/prog/js/z3950_search.js

@@ -120,7 +120,7 @@ $( document ).ready( function() {
     });
     $( "#marcPreview" ).on( "hidden", function() {
         $( "#marcPreviewLabel" ).html( "" );
-        $( "#marcPreview .modal-body" ).html( "<div id='loading'><img src='" + interface + "/" + theme + "/img/spinner-small.gif' alt='' /> " + MSG_LOADING + "</div>" );
+        $( "#marcPreview .modal-body" ).html( "<div id='loading'><img src='" + interface + "/" + theme + "/img/spinner-small.gif' alt='' /> " + __("Loading") + "</div>" );
     });
     $( "#resultst" ).on("click", ".previewData", function(e) {
         e.preventDefault();
@@ -132,7 +132,7 @@ $( document ).ready( function() {
     });
     $( "#dataPreview" ).on( "hidden", function() {
         $( "#dataPreviewLabel" ).html( "" );
-        $( "#dataPreview .modal-body" ).html( "<div id='loading'><img src='" + interface + "/" + theme + "/img/spinner-small.gif' alt='' /> " + MSG_LOADING + "</div>" );
+        $( "#dataPreview .modal-body" ).html( "<div id='loading'><img src='" + interface + "/" + theme + "/img/spinner-small.gif' alt='' /> " + __("Loading") + "</div>" );
     });
     $( "#resultst" ).on("click", ".import_record", function(e) {
         e.preventDefault();