Fix that the History Dock appears before other Docks in old projects
Fix that the History Dock appears before other Docks in old projects

Newly introduced docks, that are not apparent in old projects should
be positioned after the ones in the project-config-file.
This way it seems to be less irritating.

godotengine/godot,godotengine/godot,godotengine/godot,godotengine/godot,godotengine/godot,godotengine/godot,godotengine/godot,godotengine/godot