UX: Improve tag truncation in scrolled header (PR #13295)

Before: Screen Shot 2021-06-04 at 5 17 19 PM Screen Shot 2021-06-04 at 5 17 22 PM

After: Screen Shot 2021-06-04 at 5 12 19 PM Screen Shot 2021-06-04 at 5 08 36 PM

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