- Fix SelectionDropper, so that selection of properties work
- Hack in a ContextualMenuManipulator so that context menus work in collaboration with GraphView
- Add a "Delete" option to context menu for properties
- Only show context menu options for nodes if a node or GV is right-clicked
- When adding a new property it is now expanding initially
- Rename a few Action properties to match GraphView convention
- Add a regular Unity toolbar (using IMGUI) to Shader Graph, as it looked weird without one
- Remove old inspector