Inconsistent feature landing page UX

### How are you running Flagsmith

- [ ] Self Hosted with Docker
- [ ] Self Hosted with Kubernetes
- [x] SaaS at flagsmith.com
- [ ] Some other way (add details in description below)

### Describe the bug

The default state for unused feature pages (see screengrabs) is not consistent across the application. We should agree on a standard UX for this and apply it across the platform.

### Steps To Reproduce

Go to some unused features and view the page

### Expected behavior

Consistent experience

### Screenshots