Description of problem:
When choosing 'Rollback' action for RC, a Rollback modal is opened with some other options, if keep these options unchecked and rollback directly, it doesn't rollback rc correctly

Version-Release number of selected component (if applicable):
4.8.0-0.ci-2021-03-26-044604

How reproducible:
Always

Steps to Reproduce:
1. Create DC from example YAML(change replicas to 1) from console
2. Wait example-1 is ready, make sure no container environment for container
# ./oc48 get rc example-1 -o json | jq '.spec.template.spec.containers[0]'
{
  "image": "openshift/hello-openshift",
  "imagePullPolicy": "Always",
  "name": "hello-openshift",
  "ports": [
    {
      "containerPort": 8080,
      "protocol": "TCP"
    }
  ],
  "resources": {},
  "terminationMessagePath": "/dev/termination-log",
  "terminationMessagePolicy": "File"
}
3. Add env key and value, this will trigger a new deployment, make sure container env is set correctly
# ./oc48 get rc
NAME        DESIRED   CURRENT   READY   AGE
example-1   0         0         0       3m18s
example-2   1         1         1       16s
# ./oc48 get rc example-2 -o json | jq '.spec.template.spec.containers[0]'
{
  "env": [
    {
      "name": "key1",
      "value": "value1"
    }
  ],
  "image": "openshift/hello-openshift",
  "imagePullPolicy": "Always",
  "name": "hello-openshift",
  "ports": [
    {
      "containerPort": 8080,
      "protocol": "TCP"
    }
  ],
  "resources": {},
  "terminationMessagePath": "/dev/termination-log",
  "terminationMessagePolicy": "File"
}
4. On Workloads -> ReplicationControllers page, select 'example-1' and choose 'Rollback' in kebab action list, don't choose any additional options and click 'Rollback' to confirm the rollback action
5. A new rc example-3 is created, check its details
# ./oc48 get rc example-3 -o json | jq '.spec.template.spec.containers[0]'
{
  "env": [
    {
      "name": "key1",
      "value": "value1"
    }
  ],
  "image": "openshift/hello-openshift",
  "imagePullPolicy": "Always",
  "name": "hello-openshift",
  "ports": [
    {
      "containerPort": 8080,
      "protocol": "TCP"
    }
  ],
  "resources": {},
  "terminationMessagePath": "/dev/termination-log",
  "terminationMessagePolicy": "File"
}
# ./oc48 get pod example-3-7rh92 -o yaml | grep -i env -A3
            f:env:
              .: {}
              k:{"name":"key1"}:
                .: {}
--
  - env:
    - name: key1
      value: value1
    image: openshift/hello-openshift

Actual results:
5. We choose to rollback to 'example-1' but rc/example-3 still carried the environment setting only for example-2

Expected results:
5. since example-3 is rollback to example-1, example-1 doesn't have container environment set yet, so no environment should be set for rc/example-3

Additional info:
CLI doesn't seem reproduce the issue, here are the steps

[root@preserved-qe-ui-rhel-1 ~]# ./oc48 get rc example-1 -o json | jq '.spec.template.spec.containers[0]'
{
  "image": "openshift/hello-openshift",
  "imagePullPolicy": "Always",
  "name": "hello-openshift",
  "ports": [
    {
      "containerPort": 8080,
      "protocol": "TCP"
    }
  ],
  "resources": {},
  "terminationMessagePath": "/dev/termination-log",
  "terminationMessagePolicy": "File"
}

[root@preserved-qe-ui-rhel-1 ~]# ./oc48 get rc example-2 -o json | jq '.spec.template.spec.containers[0]'
{
  "env": [
    {
      "name": "keytest1",
      "value": "keytest2"
    }
  ],
  "image": "openshift/hello-openshift",
  "imagePullPolicy": "Always",
  "name": "hello-openshift",
  "ports": [
    {
      "containerPort": 8080,
      "protocol": "TCP"
    }
  ],
  "resources": {},
  "terminationMessagePath": "/dev/termination-log",
  "terminationMessagePolicy": "File"
}
[root@preserved-qe-ui-rhel-1 ~]# ./oc48 rollback example-1
deploymentconfig.apps.openshift.io/example deployment #3 rolled back to example-1
[root@preserved-qe-ui-rhel-1 ~]# ./oc48 get rc example-3 -o json | jq '.spec.template.spec.containers[0]'
{
  "image": "openshift/hello-openshift",
  "imagePullPolicy": "Always",
  "name": "hello-openshift",
  "ports": [
    {
      "containerPort": 8080,
      "protocol": "TCP"
    }
  ],
  "resources": {},
  "terminationMessagePath": "/dev/termination-log",
  "terminationMessagePolicy": "File"
}
[root@preserved-qe-ui-rhel-1 ~]# ./oc48 rollback example-2
deploymentconfig.apps.openshift.io/example deployment #4 rolled back to example-2
[root@preserved-qe-ui-rhel-1 ~]# ./oc48 get rc example-4 -o json | jq '.spec.template.spec.containers[0]'
{
  "env": [
    {
      "name": "keytest1",
      "value": "keytest2"
    }
  ],
  "image": "openshift/hello-openshift",
  "imagePullPolicy": "Always",
  "name": "hello-openshift",
  "ports": [
    {
      "containerPort": 8080,
      "protocol": "TCP"
    }
  ],
  "resources": {},
  "terminationMessagePath": "/dev/termination-log",
  "terminationMessagePolicy": "File"
}

[root@preserved-qe-ui-rhel-1 ~]# ./oc48 rollback example-1
deploymentconfig.apps.openshift.io/example deployment #5 rolled back to example-1
[root@preserved-qe-ui-rhel-1 ~]# ./oc48 get rc example-5 -o json | jq '.spec.template.spec.containers[0]'
{
  "image": "openshift/hello-openshift",
  "imagePullPolicy": "Always",
  "name": "hello-openshift",
  "ports": [
    {
      "containerPort": 8080,
      "protocol": "TCP"
    }
  ],
  "resources": {},
  "terminationMessagePath": "/dev/termination-log",
  "terminationMessagePolicy": "File"
}