insights: frontend creation form UI regression on pill treatment

Created by: Joelkw

The repo: archived: and fork: filter help text on creating a search based insight seems to have a new pill treatment (assuming as a result of capture group forms or the search box work) and it looks:

1. Like it’s missing padding on both light and dark themes – is the color supposed to cut off that close to the edge of the text?
2. [Blocker] Unreadable on dark theme.
3. It also seems like the corner rounding / border radius is a bit much, though maybe that's just a visual side effect of the actual issue with the padding

Before this regression:

Now:

Normal screen size to show dark theme is hard to read: