Fix: add isLoading false in landing container spotlight image reducer
Fix: add isLoading false in landing container spotlight image reducer

- Note: this was causing a nasty bug where the loading indicator would persist
- After the app was set to mobile

udacityalumni/alumni-client,udacityalumni/udacity-alumni-fe,udacityalumni/alumni-client,udacityalumni/udacity-alumni-fe