Disable sign out for AuthProxyEnabled

Sign out was disabled for AuthProxyEnabled in #3122.  This is to catch the one other instance of a sign out link in the side menu.

fix(http api): throw validation error if missing property in call to /api/admin/users/123/permissions, #7365

* Elasticsearch - Term aggregation limit fix  (should fix #7112)

* Elasticsearch - Term aggregation limit fix

Add a note about the `go get` warning that the user sees when following the setup instructions.

Added commonly used kilo-prefixed energy units

Kilovolt-ampere reactive (kvar)
Kilovolt (kV)
Kiloampere (kA)