Simplify group/logo management

- Merge logo management into group management
- Rename group manament to group management

**Wireframe 1**
![Wireframe 1](https://user-images.githubusercontent.com/12530490/119511936-2e438e00-bd73-11eb-87fb-5bb75c55d552.png)

**Wireframe 2**
![Wireframe 2](https://user-images.githubusercontent.com/12530490/119512313-7cf12800-bd73-11eb-8609-b5ce617ab236.png)
