Cluster apps installation is stuck

Summary

Not possible to install any cluster application (Just Helm)

Steps to reproduce

1. Create a cluster
2. Install Helm
3. Try to install any other application.

Example Project

This happens on master at 0912fd8a

What is the current bug behavior?

Not possible to install a cluster application

What is the expected correct behavior?

It should be possible to install a cluster application

Possible fixes

Revert https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/26991