Resource limits is equal to requests if just set requests in container default quota modal

Created by: weili520

General remarks

Describe the bug resource limits is equal to requests if just set requests in container default quota modal.

https://user-images.githubusercontent.com/33231138/135037840-7dcbb8cd-1db6-4b8e-aeeb-5d053c0ce9f8.mov

Versions used(KubeSphere/Kubernetes) KubeSphere: v3.2.0-alpha.0

Environment 3 masters: 8cpu/8g 3 nodes: 8cpu/16g

To Reproduce