FEATURE: Penalty history improvements (#13359)

* FEATURE: add penalty history when silencing a user

Display penalty history (last 6 months) when silencing/suspending a user

* FEATURE: allow default penalty values to be chosen

Adds a site setting that designates default penalty values in hours.

Silence/suspend modals will auto-fill in the default values, but otherwise
will still allow moderators to pick and overwrite values as normal.

First silence/suspend: first value
Second silence/suspend: second value
etc.

Penalty counts are forgiven at the same rate as tl3 promotion requirements do.

Co-authored-by: jjaffeux <j.jaffeux@gmail.com>

app/assets/javascripts/admin/addon/components/admin-penalty-history.js

@@ -0,0 +1,22 @@
+import Component from "@ember/component";
+import discourseComputed from "discourse-common/utils/decorators";
+
+export default Component.extend({
+  classNames: ["penalty-history"],
+
+  @discourseComputed("user.penalty_counts.suspended")
+  suspendedCountClass(count) {
+    if (count > 0) {
+      return "danger";
+    }
+    return "";
+  },
+
+  @discourseComputed("user.penalty_counts.silenced")
+  silencedCountClass(count) {
+    if (count > 0) {
+      return "danger";
+    }
+    return "";
+  },
+});