Description of problem:
Pod warning info could not be cleared when warning icon disappears. Also event warning info couldn't be cleared

Version-Release number of selected component (if applicable):
openshift v1.3.0-alpha.1-400-g5493ff6-dirty
kubernetes v1.3.0-alpha.3-599-g2746284
etcd 2.3.0+git

How reproducible:
Very Often

Steps to Reproduce:
1. Create a test pod which could trigger warning info on console
In this example, pod image yapei/test-volume:test1 could not be found
cat << EOF > pod.yaml 
{
  "kind": "Pod",
  "apiVersion":"v1",
  "metadata": {
        "name": "test-volume-instruction"
  },
  "spec": {
      "containers": [{
        "name": "test-volume-instruction",
        "image": "yapei/test-volume:test1",
        "ports": [
          {
            "containerPort": 8080
          }
        ]
      }]
  }
}
EOF
2. Login to web console, and go to Browse -> Pod page
3. When warning icon is triggered, hover the icon and warning info will be displayed
4. When warning icon disappears(maybe change to other intermediate state), the warning context is still there
5. Check event warning info

Actual results:
4. When warning icon disappears(maybe change to other intermediate state), the warning context is still there and shown on every page, there is no way to clear it
5. Event page warning info could not be cleared 

Expected results:
4. When warning icon disappears, popover context should also be cleared
5. Warning info should be cleared after mouse is moved away

Additional info: