This request in on the same lines of the issue. It would be great if this feature can be built along with the below issue

#488

Description

The challenge manager should get the option to extend phases of the challenges from the direct portal. Mainly Registration and submission phase. This being a very common use case from TopGear contribute to a large number of request from top gear folks on a daily basis. Having this feature will ease out the dependency on support folks to a greater extent for extending the phases of the challenge as and when required or deemed fit by the challenge managers.