Edwh-uptime-plugin

Fix

* Set default of apikey to empty string instead of None ([`c46ed10`](https://github.com/educationwarehouse/edwh-uptime-plugin/commit/c46ed10a7bb1bb23eb71a224a463348d7b012c30))

Fix

* **deps:** Include two missing dependencies ([`09fb42e`](https://github.com/educationwarehouse/edwh-uptime-plugin/commit/09fb42e88c5c79dc02fc8cf80e31173a1d03b14f))

Fix
* Delayed init of UptimeRobot instance, since this depends on TomlConfig which is not always available ([`c73daee`](https://github.com/educationwarehouse/edwh-uptime-plugin/commit/c73daeed3ffec5766247795c1b97e44b84773e9b))

Fix
* **auto-add:** Pre-select already added domains ([`8fa7b03`](https://github.com/educationwarehouse/edwh-uptime-plugin/commit/8fa7b03e54b51c92d1202fd50af3e768af59483b))