System Console: Email notification content setting (#7122)

* PLT-7195: Added new config option, new license feature, and config UI to system console. Still need to implement behaviour change in email batching code

* PLT-7195: Modified batch emails to respect email notification content type setting

* PLT-7195: Tweaking the colours a bit

* PLT-7195: Added support for email notification content type setting in immediate (non-batched) notification messages. Attempted to clean up the code somewhat. Unit tests coming in a future commit

* PLT-7195: Added unit tests for non-batched emails

* Checked license when applying email content settings

* Changed return type of getFormattedPostTime

utils/config_test.go

@@ -277,3 +277,13 @@ func TestValidateLocales(t *testing.T) {
 		t.Fatal("Should have returned an error validating AvailableLocales")
 	}
 }
+
+func TestGetClientConfig(t *testing.T) {
+	TranslationsPreInit()
+	LoadConfig("config.json")
+
+	configMap := getClientConfig(Cfg)
+	if configMap["EmailNotificationContentsType"] != *Cfg.EmailSettings.EmailNotificationContentsType {
+		t.Fatal("EmailSettings.EmailNotificationContentsType not exposed to client config")
+	}
+}