Updating UX of contextual view (drawer): Drawer design & content
## Summary The drawer component will be added to all planning views (referenced below), however this component is not reflecting the final state design as outlined in https://gitlab.com/gitlab-org/gitlab/-/issues/409886. This issue will itemize the UX updates needed to reach the final design state as outlined in https://gitlab.com/gitlab-org/gitlab/-/issues/409886. ### Planning views linked issues - [Boards](https://gitlab.com/gitlab-org/gitlab/-/issues/464063) - [Lists](https://gitlab.com/gitlab-org/gitlab/-/issues/463829) - [Detail Page](https://gitlab.com/gitlab-org/gitlab/-/issues/444434) - [Roadmap](https://gitlab.com/gitlab-org/gitlab/-/issues/7474)
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