Add community filter & display to audit logs

[Oaphi]

This PR adds a community filter & display for audit logs:

Also restores the "grant" button for making a user a local admin (seems like it recently got broken by accident)

For now the log's community is always shown - even if the user can only see the current community's logs - does anyone think we should conditionally hide it?

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.09%. Comparing base (9aa6d7d) to head (709dbe0).

Additional details and impacted files

Components	Coverage Δ
controllers	77.86% <100.00%> (+0.04%)	⬆️
helpers	85.62% <100.00%> (+0.03%)	⬆️
jobs	79.93% <ø> (ø)
models	93.50% <ø> (ø)
tasks	61.11% <ø> (ø)
scripts	∅ <ø> (∅)

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[cellio]

I tested this and aside from one issue that is probably about how we set up dev environments, not about this change (see separate comment), this works as expected and is a big usability improvement. Scoping to global admins is fine.

[cellio]

For now the log's community is always shown - even if the user can only see the current community's logs - does anyone think we should conditionally hide it?

No, I think it's better if the entry shows all the logged info even if this piece is contextually redundant. It's not like we're filling up your screen with a bunch of irrelevant stuff...

[cellio]

Community links work as expected now. LGTM.