FEATURE: Overhaul of admin API key system (#8284)

- Allow revoking keys without deleting them
- Auto-revoke keys after a period of no use (default 6 months)
- Allow multiple keys per user
- Allow attaching a description to each key, for easier auditing
- Log changes to keys in the staff action log
- Move all key management to one place, and improve the UI

app/assets/javascripts/admin/controllers/admin-api-keys-index.js.es6

@@ -0,0 +1,13 @@
+import { popupAjaxError } from "discourse/lib/ajax-error";
+
+export default Ember.Controller.extend({
+  actions: {
+    revokeKey(key) {
+      key.revoke().catch(popupAjaxError);
+    },
+
+    undoRevokeKey(key) {
+      key.undoRevoke().catch(popupAjaxError);
+    }
+  }
+});