Managing recordings (seeing currently open, switching, and opening new recordings) is currently hidden under the Rerun menu. It's useful to keep track of what recording is currently open. In addition, open recordings take up memory so it's useful to see how many are open and to easily close recordings that shouldn't be.

Demo video for new design:
https://github.com/rerun-io/rerun/assets/2624717/b83a3aee-0305-48d9-82bf-83327ba0963e

Link to Figma design: https://www.figma.com/file/3WX8yUqa8ECmhLwV6NIF3a/Rerun-Design-System?type=design&node-id=2698%3A21576&t=AjbICV0m6HjAd7UR-1

TODO

• Move all recording actions from the Rerun menu to above the blueprint in the left view according to the design
  • All open recordings with matching app ID are listed
  • Possible to change active recording by clicking
  • Close recording by pressing close button (X)
  • Open new recording by pressing the + button