Allow dropping a .action into the Action Graph editor
https://files.facepunch.com/ziks/2024-05-16/sbox-dev_7kY8vTea7g.mp4
Fixed target type of AGs on the root of a prefab
AG node double-click opens new tab in same window
Can drag .action resources into Action properties
https://files.facepunch.com/ziks/2024-05-16/sbox-dev_rSLRXcZtPU.mp4