[ui] Agent config and User localStorage defaults for filters

[philrenaud]

TODO: Add Nomad Variables as one of the ways that user preferences can get read.

Order should be:

1. config from the user agent's ui.defaults block
2. defaults from a nomad variable at nomad/ui/defaults/token_ID or something similar
3. defaults from localStorage, set from a form in the UI
4. manually editing the page in question (filtering by namespace on the jobs page for example, which doesn't re-set your defaults but does override them for that session)

[github-actions[bot]]

Ember Test Audit comparison

	main	88a5c1c37ea133643225afffdee34381f367c062	change
passes	1578	1553	-25
failures	0	25	+25
flaky	0	0	0
duration	11m 56s 489ms	000ms	-11m 56s 489ms