Support for locking weeks for editing

[olemp]

Your checklist for this pull request

• Make sure you are requesting to pull a feature/bugfix branch (right side).
• Make sure you are making a pull request against the dev branch (left side). Also you should start your branch off our dev branch.
• Check your code additions locally using npm run watch
• Make sure strings/resources are added using our resource files
• Make sure CHANGELOG.md is updated if applicable
• Make sure Smoke tests are updated if applicable

Review checklist

• Tested locally

Description

Lock weeks for editing.

Related issues

Closes #1249

[okms]

Couple of issues:

1. Even though i cannot re-open the week, did tells me i can do so
   

2. where does the comment go when you close a week? Its not visible in the "Week status" view
   https://didapp-dev.azurewebsites.net/admin/weekStatus

3. i can still forecast hours for weeks that are closed, should be disabled too for consistency