update CSS selector, fixes #254

js/vips.js

@@ -89,7 +89,7 @@ $(function() {
         });
     }
 
-    $(document).on('focus', '.ck-content', function(event) {
+    $(document).on('focus', '.ck-editor__editable', function(event) {
         vipsCharacterPickerTarget = $(this);
         vipsCharacterPickerTarget.data('ckeditor', this.ckeditorInstance);
     });