Error while drawing the commit graph

[axifive]

• Gitea version (or commit ref): 2eabf18
• Git version: Go1.10.2
• Operating system: Linux
• Database (use [x]):
  • MySQL
• Can you reproduce the bug at https://try.gitea.io:
  • Yes (provide example URL) https://try.gitea.io/go-gitea/gitea/graph
• Log gist:
  js error: https://gist.github.com/axifive/c18d8143fc551e6d01e2b563914e521c

Description

Commit graph with a large number of branches is shifted and drawn incorrectly

Screenshots

2.

[kjellkvinge]

This might be a duplicate of #3382

[daviian]

@lunny Can be closed as duplicate