draft: Use a sidebar for Manage Jenkins

[janfaracik]

Draft PR for the time being.

This PR overhauls Manage Jenkins to use a sidebar for links, rather than the current grid view. This was discussed on https://community.jenkins.io/t/new-settings-view-feedback-wanted/ and I've opened a draft PR to get further thoughts on implementation and to highlight things that I've missed.

The advantages to this design:

• One less click to get to ‘General’ settings
• Easy to switch between sections (no more having to go back to the Settings page)
• Consistent with other views in Jenkins (e.g. Configure projects, Plugins)
• Better use of screen real estate (currently inputs needlessly use the full page width)

Screenshots

This will require updates to plugins to implement the ManagementLink side panel.

Testing done

Todo

Proposed changelog entries

• Use a sidebar for Manage Jenkins

Proposed upgrade guidelines

N/A

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Desired reviewers

@jenkinsci/sig-ux

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[janfaracik]

Placeholder class for the time being - this needs to be replaced.

[janfaracik]

This entire page still needs work

[janfaracik]

Would it be worth having a new component (e.g. SettingsItemLayout.jelly) rather than layout.jelly to wrap pages?

[daniel-beck]

Are what you listed the only benefits of this? They seem fairly minor in comparison to the drawbacks: This

1. drops the ability to have descriptions (including some that include important status information, like Script Security's)
2. loses the ability to adapt the sidebar of actual configuration forms (System, Security, possibly Tools) to job configuration forms, making the differences in how similar things work between different parts of Jenkins worse
3. does not scale as well to more items since it loses the horizontal dimension
4. requires adaptation in tons of plugins to not have a very broken experience (see e.g. "Load Statistics" in the current PR state)
5. Makes admin monitors awkward since they'll clutter up the global configuration now
6. Admin monitors need to be adapted if they refer to configuration options in System, potentially needing different wordings between the popup and this one (see e.g. the one if no root URL is defined).

In particular, I don't see how

Consistent with other views in Jenkins (e.g. Configure projects, Plugins)

applies other than at the most superficial level. Job configurations navigate inside the same form, while here, everything navigates elsewhere, dropping unsaved changes.

This mirrors a similar change in Mac OS System Preferences to make it more iPhone-like, which I've only seen overwhelmingly negative feedback for. Replicating phone UI when you have giant screens makes no sense.

Beyond the above, I'm curious what your plans for the sidepanel of the plugin manager are. Given we've moved items from elsewhere to there less than a year ago, with further related changes in a PR (#8376, open when I commented and now merged), that seems to clash with this proposal quite significantly.

[github-actions]

Please take a moment and address the merge conflicts of your pull request. Thanks!

[github-actions]

Please take a moment and address the merge conflicts of your pull request. Thanks!

[github-actions]

Please take a moment and address the merge conflicts of your pull request. Thanks!

[janfaracik]

Will write a proposal for this and come back to it - thanks all.