PMM-15046 Move NavItem component to percona-ui and fix PMM sidebar inconsistencies

[pmcf-percona]

https://perconadev.atlassian.net/browse/PMM-15046

• PMM-15046 Move NavItem component to percona-ui and fix PMM sidebar inconsistencies percona/pmm#5328

[JNKPercona]

Server docker: perconalab/pmm-server-fb:PR-4374-c2bc16e
Client docker: perconalab/pmm-client-fb:PR-4374-c2bc16e
Watchtower docker: perconalab/pmm-watchtower-fb:PR-4374-c2bc16e
Client tarball: https://s3.us-east-2.amazonaws.com/pmm-build-cache/PR-BUILDS/pmm-client/pmm-client-PR-4374-c2bc16e.tar.gz
Staging instance: https://pmm.cd.percona.com/job/pmm3-aws-staging-start/parambuild/?DOCKER_VERSION=perconalab/pmm-server-fb:PR-4374-c2bc16e&CLIENT_VERSION=https://s3.us-east-2.amazonaws.com/pmm-build-cache/PR-BUILDS/pmm-client/pmm-client-PR-4374-c2bc16e.tar.gz

[JNKPercona]

API tests have failed: https://pmm.cd.percona.com/job/pmm3-api-tests/6234/

[JNKPercona]

Server docker: perconalab/pmm-server-fb:PR-4374-27616fa
Client docker: perconalab/pmm-client-fb:PR-4374-27616fa
Watchtower docker: perconalab/pmm-watchtower-fb:PR-4374-27616fa
Client tarball: https://s3.us-east-2.amazonaws.com/pmm-build-cache/PR-BUILDS/pmm-client/pmm-client-PR-4374-27616fa.tar.gz
Staging instance: https://pmm.cd.percona.com/job/pmm3-aws-staging-start/parambuild/?DOCKER_VERSION=perconalab/pmm-server-fb:PR-4374-27616fa&CLIENT_VERSION=https://s3.us-east-2.amazonaws.com/pmm-build-cache/PR-BUILDS/pmm-client/pmm-client-PR-4374-27616fa.tar.gz

[JNKPercona]

API tests have succeded: https://pmm.cd.percona.com/job/pmm3-api-tests/6243/