Repository graph screen has unnecessary scrollbars
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### Problem
Minor UI niggle to raise for GitLab SaaS.
On the **Code > Repository graph** screen, there is an unnecessary horizontal scrollbar in the main graph panel, and a vertical scrollbar for the whole page. If the panel and page was sized correctly, neither of these scrollbars would need to be displayed.
As far as I can tell, this issue occurs mainly in Chrome-like browsers, including MS Edge.
### Screenshot

issue