fix(admin-ui): Change max height to min height for channel assignment block

[monrostar]

Description

Updated the block height for the Channel block .channel-assignment. Because there was a fixed height there, a large number of channels simply did not fit and the button to add new channels was hidden

Breaking changes

Does this PR include any breaking changes we should be aware of?

• no

Screenshots

Before

After

Checklist

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• I have set a clear title
• My PR is small and contains a single feature
• I have checked my own PR

👍 Most of the time:

• I have added or updated test cases
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Name	Status	Preview	Updated (UTC)
docs	✅ Ready (Inspect)	Visit Preview	Jul 31, 2024 0:44am

[monrostar]

@michaelbromley

I don't know why this fix hasn't been made yet, but it's so annoying :)
Even though we don't use this functionality, I would like to see all channels and the button :)

[michaelbromley]

Does this still look reasonable with only eg 2 channels assigned? Not too much white space?

[monrostar]

Does this still look reasonable with only eg 2 channels assigned? Not too much white space?

Yeah, that's a good question :) I'll update again

[monrostar]

Does this still look reasonable with only eg 2 channels assigned? Not too much white space?

Yeah, that's a good question :) I'll update again

24px will be fine. This is almost minimum

[michaelbromley]

Thanks!