Feature Request RMQ-2359 (backport #15044)

[mergify]

Proposed Changes

Implement feature request RMQ-2359:

• Preserve order of configured resource server ids in the management ui
• Provide a mechanism to preselect the resource id in the management ui during service-provider initiated logons.

It is accompanied by a docs PR (rabbitmq/rabbitmq-website#2411) which is not finished yet. It has the first bullet-point but I am still working on the second one.

NOTE: There is a second PR following this one which adds additional selenium test coverage. #15101

Types of Changes

What types of changes does your code introduce to this project?
Put an x in the boxes that apply

• Bug fix (non-breaking change which fixes issue #NNNN)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause an observable behavior change in existing systems)
• Documentation improvements (corrections, new content, etc)
• Cosmetic change (whitespace, formatting, etc)
• Build system and/or CI

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This is an automatic backport of pull request #15044 done by [Mergify](https://mergify.com).