Scale Users in CF Summary section

[richard-cox]

• Only fetch users count on cf/org/space summary pages instead of all users
  • Use the following to fetch the counts

  • Level	Admin	Non-Admin
    CF	/users	Don't show stat
    Org	/org/users	/org/users
    Space	/space/users	/space/users

• Don't show users table when there are too many users
  • Previously we'd try to fetch alllll users (via /users for admin or multiple /org/users requests)
  • Now we make a single request per level that uses flattenPaginationMax to limit the amount of response
  • For admin, mitigate this by attempting to use org or space lists, see below table

  • Level	Admin	Non-Admin
    CF	/users or nothing if maxed	Don't show users tab
    Org	/users or /org/users if maxed	/org/users
    Space	/users or /space/users if maxed	/space/users

• Only show Retrieving Details message on cf/org/space pages when fetching apps, otherwise load data asynchronously.
• Hide cf/org/space user table filter roles drop down when we fetch from /org or /space (lists only return users with roles)
• Fix org level users table space column
  • Custom message and space role prefixes should show when at org level only
  • Previously this was determined by the spaces collection passed in only containing a single space
  • This was incorrectly true when an org had only one space
• Depends on Improve handling of maxed state and observables #3370

[cfdreddbot]

✅ Hey richard-cox! The commit authors and yourself have already signed the CLA.

[codecov]

Codecov Report

Merging #3371 into v2-master will decrease coverage by 0.03%.
The diff coverage is 61.97%.

@@              Coverage Diff              @@
##           v2-master    #3371      +/-   ##
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- Coverage       70.3%   70.26%   -0.04%     
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  Files            686      686              
  Lines          30351    30270      -81     
  Branches        6895     6894       -1     
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- Hits           21337    21268      -69     
+ Misses          9014     9002      -12

[KlapTrap]

LGTM - mergable when the gates have passed.