feat(ui): display new label for tag action

[huwshimi]

Done

• Add a new label to the tag action when it is first seen.

QA

MAAS deployment

To run this branch you will need access to one of the following MAAS deployments:

• Bolla
• A development MAAS
• A local snap MAAS (this will not usually have machines)

Running the branch

You can run this branch by:

• Serving with dotrun
• Building in a development MAAS

QA steps

• Visit the machine list.
• Tick a/some machines.
• Open the take action menu.
• The tag action should have "(NEW)" label next to it.
• Click on the tag action and then press cancel.
• Open the take action menu again and the "(NEW)" label should not be visible.

Fixes

Fixes: canonical-web-and-design/app-tribe#692.

[petermakowski]

LGTM