UI: Change down to highest-priority composite status

[backspace]

As pointed out by @nickethier, if a node was ineligible before
it went down, downness should be displayed, not ineligibility.

[github-actions]

Ember Asset Size action

As of 9adfcf7

Files that got Bigger 🚨:

File	raw	gzip
nomad-ui.js	+27 B	+11 B

Files that stayed the same size 🤷‍:

File	raw	gzip
vendor.js	0 B	0 B
nomad-ui.css	0 B	0 B
vendor.css	0 B	0 B

[github-actions]

Ember Test Audit comparison

	master	9adfcf7	change
passes	1550	1550	0
failures	0	0	0
flaky	0	0	0
duration	7m 03s 361ms	6m 59s 906ms	-03s 455ms

[github-actions]

Ember Test Audit flaky tests

Ember Test Audit detected these flaky tests on 6cbed10510cf4475c96fb52b2e151ca51bfc37b9:

• Acceptance | client detail: the status light indicates when the node is ineligible for scheduling

[DingoEatingFuzz]

Makes sense to me!

[github-actions]

I'm going to lock this pull request because it has been closed for 120 days ⏳. This helps our maintainers find and focus on the active contributions.
If you have found a problem that seems related to this change, please open a new issue and complete the issue template so we can capture all the details necessary to investigate further.