A few buttons are bright blue instead of the normal green or dark blue

This may be the expected behavior but a few pages have bright blue buttons instead of the standard dark blue or green.

## Current Behavior
Some buttons in Graylog Open have bright blue buttons instead of green or dark blue. This may be expected but opened this to confirm.

System -> Sidecars

System -> Logging

System -> Inputs

System -> Grok Patterns -> Create pattern

Enterprise

* Graylog Version: 6.0.0-beta.3
* Browser version: Chrome Version 123.0.6312.59 (Official Build) (arm64)

Start by reproducing the button colors on System → Sidecars, Logging, Inputs, Grok Patterns → Create pattern, and the Enterprise pages in Graylog Open 6.0.0-beta.3. Compare each button with the standard green or dark-blue styles and confirm whether all reported buttons should use the standard colors.

Written by the indexing model from the issue text.