[UI] After uninstalling CNV from the installed operators, maintenance still appeared as an option.

Description of problem:
After uninstalling CNV from the installed operators through the web console, maintenance still appeared as an option.

from CLI we can see that NMO uninstalled successfully -

before uninstall:
[kni@provisionhost-0-0 ~]$ oc get deployments -A | grep node
openshift-cluster-node-tuning-operator cluster-node-tuning-operator 1/1 1 1 19h
openshift-cnv node-maintenance-operator 1/1 1 1 18h

after uninstall:
[kni@provisionhost-0-0 ~]$ oc get deployments -A | grep node
openshift-cluster-node-tuning-operator cluster-node-tuning-operator 1/1 1 1 19h

-------------------------------------------------------------
Version-Release number of selected component (if applicable):
[kni@provisionhost-0-0 ~]$ oc version
Client Version: 4.7.0-fc.2
Server Version: 4.7.0-fc.2
Kubernetes Version: v1.20.0+394a5a3

CNV version 2.6.0 : {"kubevirt-hyperconverged":{"iib":"registry-proxy.engineering.redhat.com/rh-osbs/iib:38154"}}
-------------------------------------------------------------
How reproducible:
100%
-------------------------------------------------------------
Steps to Reproduce:
1.From the web-console -> go to "Operators" -> "installed operators" -> choose openshift virtualization (2.6.0) and click on "Uninstall"
2.Go to "Compute" -> "Nodes" and then choose one of the masters and from the kebab option we can see that "Start maintenance" is still appeared.

-------------------------------------------------------------
Actual results:
maintenance is still appeared as an option.
-------------------------------------------------------------
Expected results:
no option "start maintenance"
-------------------------------------------------------------