Better events / notifications

[jemayn]

Would be awesome to have something similar to Umbracos EditorModel Notifications to hook into this event to do things on pageload.

Additionally I'd love it if the EntitySavingNotification had some context of the page/collection you were in.
I have a usecase where I use the same collection and show it in seperate tree nodes using the global filter. However I need to set some values on the entity based on which of the tree nodes it is.

The only way I've found for doing that is to create a custom property editor which can get it based on the pages url from the collectionAlias. However that is a lot of hoops to run through to do this.