Add move tool controls for paths

[dodderss]

Describe the project you are working on: A car game with track using curve3d and path

Describe the problem or limitation you are having in your project: I need to drag the path points into specific places

Describe the feature / enhancement and how it helps to overcome the problem or limitation: Adding move tool would help put things in more specific places rather than having to fight with the screen relative controls we have at the moment.

Describe how your proposal will work, with code, pseudo-code, mock-ups, and/or diagrams: I have no clue of how you would do it but here is a badly photoshoped example of what it might look like here

If this enhancement will not be used often, can it be worked around with a few lines of script? I think it would be used often and since there is already a tool for moving nodes i dont think it would be too hard to implement

Is there a reason why this should be core and not an add-on in the asset library? It could be an add on but I think it should be a main feacture as the original controls are hard to use

[Calinou]

Duplicate of #527.

PS: You can hold Ctrl and Ctrl + Shift while moving Path3D handles to get coarse or fine snapping. While not as convenient as manually inputting values in the inspector, this is usually enough to have perfectly aligned lines.