[UX] Status report page: show jQuery and jQuery UI as info instead of status.

[klonos]

Current behavior:

Proposed change:

Reasoning: this belongs with the rest of the components that we simply need to communicate their version to the site admin. In D7, this was managed by contrib (https://www.drupal.org/project/jquery_update), and was configurable; whereas in Backdrop we ship an up to date, non-configurable version with core + we have a on-going issues to keep things up to date (#2493) + follow-up issues to update core to jQuery 2.x and eventually to 3.x (#3106).

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PR by @klonos: backdrop/backdrop#2745

[klonos]

...while at it, I've:

• fixed the website links for the jQuery UI libraries in system.module
• removed duplicate library declaration for the "Scale" effect
• made sure that ui.touch-punch is listed alphabetically
• moved the jQuery version into the info description (makes it render collapsed, under a "more" link)
• added info about all jQuery and jQuery UI plugins:

Collapsed:

Expanded:

[klonos]

...also:

• made sure that all libraries in system_library_info() are listed alphabetically (better DX + easier to spot duplicate entries in the future)
• made jQuery plugin labels links to the website of the respective plugin.

[quicksketch]

I wasn't sure quite what was happening with the code to make a list of every jQuery library's version, but now that I've seen the result, this seems genuinely useful. Code looks good to me too. Thanks @klonos for the PR and thanks @herbdool for reviewing!

I've merged backdrop/backdrop#2745 into 1.x and 1.16.x.

[quicksketch]

I had to revert this commit because it seems that it has broken JS on some pages, such as the modules page (/admin/modules). Visiting that page, you'll get a JS error in the console that "jQuery is not defined".

Viewing the source, you see that the jquery.once library is loaded before jQuery itself is:

<script src="http://backdrop-core.lndo.site/core/misc/jquery.once.js?v=1.2.0"></script>
<script src="http://backdrop-core.lndo.site/core/misc/backdrop.js?v=1.16.x-dev"></script>
<script src="http://backdrop-core.lndo.site/core/misc/jquery.js?v=1.16.x-dev"></script>
<script src="http://backdrop-core.lndo.site/core/misc/jquery-extend-3.4.0.js?v=1.16.x-dev"></script>

Reopening and marking this as needs work.

[quicksketch]

Just a guess as to why this may have happened: it's possible that some libraries defined the same weight (such as -20). And reordering the libraries in system_library_info() may have caused the libraries to come out in different orders than before. I haven't checked this in-depth.