Give judge assign queues human readable urls

[hschallhorn]

After work on #12423, users will be able to view the judge assign page of a judge. This url is formed as "/queue/<user_id>/assign". Users cannot be expected to know the caseflow user id of a judge. We should use their css id instead.

AC

• Judge Assign queue url is "/queue/<user_css_id>/assign"

[kevmo]

Make sure old URLs continue to workwhile defaulting to displaying new URLs.

[kevmo]

Estimation: 3

What is this graph?

1 | 
2 | |||||
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5 | |
8 | 

Why a 2? Straightforward!!! This is what Rails does, "add one line, change another line, make a test..."

Why a 5? Could blow up because this URL is going through React Router. Pass through many different components. Front-end refactoring could dramatically expand the amount of work -- this is not just a backend change!

[yoomlam]

Since we're overloading <user_css_id> in the URL "/queue/<user_css_id>/assign", I'll have to assume that if <user_css_id> is an integer?, then it is a <user_id>. This means that a CSS_ID must never be an integer or coercible into an integer.