Inspect hovered node while dragging

[AeioMuch]

Allow to edit in the inspector the hovered node while dragging other node(s) over it for 1 second in the editor scene tree dock.
This is to avoid having to rely on the workaround and add the missing piece mentioned here : #89406
It also propagate the notification to the inspector dock to highlight the valid properties for the drop

[ajreckof]

Just passing through a node will change the inspector will modify the inspector to edit this node after a few seconds

output.mp4

Moreover I'm wondering why just modify the inspector and not directly select the node in the SceneTreeEditor? this would give better visibility on which node the inspector is and would be a more local solution (don't need a new include)

[KoBeWi]

I found a corner-case bug 🤔 When you hover a node and press Escape to cancel dragging, the node will still get inspected afterwards (since the mouse doesn't move). You can use NOTIFICATION_DRAG_END to handle that.

btw why is this still a draft?

[akien-mga]

Thanks!