Don't show empty metadata sections and create an empty state for metadata in general

[dzonidoo]

NHUB-610

Purpose

For the ‘Category’ section we show the label even if there are no values available. This is not consistent wit other metadata fields. The sections should be hidded if there is no data available

What has changed

Rendering of metadata fields

Steps to test

1. Open an article panel
2. Scroll to the metadata section

Checklist

• This pull request is not adding new forms that use redux
• This pull request is adding missing TypeScript types to modified code segments where it's easy to do so with confidence
• This pull request is replacing lodash.get with optional chaining for modified code segments

Resolves: #[issue-number]

[tomaskikutis]

All good, except when using conditionals or ternary expressions the condition should be a boolean e.g.
result = <boolean> ? a : b and not result = <number> ? a : b

[dzonidoo]

yes ure right... ill change taht one and then merge