Add default values to static ADR in MAC settings

[PavelJankoski]

Summary

Error: error:pkg/errors:validation (invalid `end_device`: embedded message failed validation); error:pkg/errors:validation (invalid `nb_trans`: value must be inside range [1, 15])
  at <anonymous> (./pkg/webui/lib/errors/utils.js:585:60)
  at ye.withScope (/libs.b2a0d7d5807e9467fde3.bundle.js:2:2547237)
  at Object.be [as withScope] (/libs.b2a0d7d5807e9467fde3.bundle.js:2:2547904)
  at Module.Ce (/libs.b2a0d7d5807e9467fde3.bundle.js:2:2548562)
  at ingestError (./pkg/webui/lib/errors/utils.js:577:5)
...
(6 additional frame(s) were not displayed)

Changes

• Added default values for static ADR in MAC settings.

Testing

Steps

Go to device's general settings. Expand the Network layer, then expand Advanced MAC settings. Try selecting static( fields should already be populated with default values) and click save changes right away.

Results

There shouldn't be an error displayed.

Checklist

• Scope: The referenced issue is addressed, there are no unrelated changes.
• Compatibility: The changes are backwards compatible with existing API, storage, configuration and CLI, according to the compatibility commitments in README.md for the chosen target branch.
• Documentation: Relevant documentation is added or updated.
• Testing: The steps/process to test this feature are clearly explained including testing for regressions.
• Infrastructure: If infrastructural changes (e.g., new RPC, configuration) are needed, a separate issue is created in the infrastructural repositories.
• Changelog: Significant features, behavior changes, deprecations and fixes are added to CHANGELOG.md.
• Commits: Commit messages follow guidelines in CONTRIBUTING.md, there are no fixup commits left.