changelog: don't load branches for parents as we don't need them for DAG graph.

rhodecode/apps/repository/views/repo_changelog.py

@@ -89,7 +89,7 b' class RepoChangelogView(RepoAppView):'
             data = dict(
                 raw_id=commit.raw_id,
                 idx=commit.idx,
-                branch=h.escape(commit.branch),
+                branch=None,
             )
             if parents:
                 data['parents'] = [

rhodecode/public/js/src/rhodecode/changelog.js

@@ -145,7 +145,7 b' var CommitsController = function () {'
     this.loadNext = function (node, page, branch, commit_id, f_path) {
         var loadUrl = this.getChunkUrl(page, 'next', branch, commit_id, f_path);
         var postData = {'graph': JSON.stringify(this.getCurrentGraphData())};
-
+        $(node).html('loading...').addClass('disabled').css({'cursor':'default'});
         $.post(loadUrl, postData, function (data) {
             $(node).closest('tbody').append(data);
             $(node).closest('td').remove();
@@ -156,7 +156,7 b' var CommitsController = function () {'
     this.loadPrev = function (node, page, branch, commit_id, f_path) {
         var loadUrl = this.getChunkUrl(page, 'prev', branch, commit_id, f_path);
         var postData = {'graph': JSON.stringify(this.getCurrentGraphData())};
-
+        $(node).html('loading...').addClass('disabled').css({'cursor':'default'});
         $.post(loadUrl, postData, function (data) {
             $(node).closest('tbody').prepend(data);
             $(node).closest('td').remove();