Highlight orders

[symt]

This will be toggled off by default

Implement a feature that color codes the orders in the order menu with which ones are outdated and which ones are not.

There should be a few cases where this logic is triggered:

1. When the order menu is opened
2. When an order status changes AND the order menu is open

We also need the config option in the notification module settings to toggle this (which should be super straightforward with OneConfig)

The logic for this feature (which should be extracted into its own method), is in NotificationModule::highlightOrder

This is closely tied to #118