FIX: Resetting site setting didn't remove "overriden" state

test/javascripts/acceptance/admin-site-settings-test.js.es6

@@ -0,0 +1,45 @@
+import { acceptance } from "helpers/qunit-helpers";
+
+acceptance("Admin - Site Settings", {
+  loggedIn: true,
+
+  pretend(server, helper) {
+    server.put("/admin/site_settings/**", () =>
+      helper.response({ success: "OK" })
+    );
+  }
+});
+
+QUnit.test("changing value updates dirty state", async assert => {
+  await visit("/admin/site_settings");
+  await fillIn("#setting-filter", "title");
+  assert.equal(count(".row.setting"), 1, "filter returns 1 site setting");
+  assert.ok(!exists(".row.setting.overridden"), "setting isn't overriden");
+
+  await fillIn(".input-setting-string", "Test");
+  await click("button.cancel");
+  assert.ok(
+    !exists(".row.setting.overridden"),
+    "canceling doesn't mark setting as overriden"
+  );
+
+  await fillIn(".input-setting-string", "Test");
+  await click("button.ok");
+  assert.ok(
+    exists(".row.setting.overridden"),
+    "saving marks setting as overriden"
+  );
+
+  await click("button.undo");
+  assert.ok(
+    !exists(".row.setting.overridden"),
+    "setting isn't marked as overriden after undo"
+  );
+
+  await fillIn(".input-setting-string", "Test");
+  await keyEvent(".input-setting-string", "keydown", 13); // enter
+  assert.ok(
+    exists(".row.setting.overridden"),
+    "saving via Enter key marks setting as overriden"
+  );
+});