Commit graph blurry on HiDPI screens

[michaelkuhn]

• Gitea version (or commit ref): 7e6c198
• Operating system: Linux/Chrome
• Can you reproduce the bug at https://try.gitea.io:
  • Yes: https://try.gitea.io/frankenstein/cpython/graph

Description

On HiDPI screens, the commit graph is blurry. I have opened a PR for gitgraph.js to fix this: bluef/gitgraph.js#3
This should also be pulled into Gitea to fix the problem.

Screenshots

[lunny]

closed by #2957