bugs for project members list page of devops project

Created by: junotx

Describe the bug

1. The list still shows all project members when searching by name
2. There is a problem with the paging function (It is not next page when clicking next page)

Versions used(KubeSphere/Kubernetes) KubeSphere(2020-07-25)

/kind bug /priority high /milestone 3.0.0 /assign @harrisonliu5