comments-history: Fix Utf8 to 64 encoding

rhodecode/public/js/src/rhodecode/comments.js

@@ -1020,7 +1020,7 b' var CommentsController = function() {'
 
                     initVersionSelector(versionSelectId, {results: preLoadVersionData});
 
-                    $comment.attr('data-comment-text', btoa(text));
+                    $comment.attr('data-comment-text', utf8ToB64(text));
 
                     var versionSelector = $('#comment_versions_'+comment_id);
 

rhodecode/public/js/src/rhodecode/utils/string.js

@@ -188,3 +188,7 b' function b64DecodeUnicode(str) {'
         return '%' + ('00' + c.charCodeAt(0).toString(16)).slice(-2);
     }).join(''));
 }
+
+function utf8ToB64( str ) {
+    return window.btoa(unescape(encodeURIComponent( str )));
+}
  No newline at end of file