Add a "revert" icon for nodes with Editable Children enabled in the Scene tree dock

[Wolfcrux]

Describe the project you are working on

3D Action RPG

Describe the problem or limitation you are having in your project

Changes made to properties on nodes in scenes with Editable Children can be hard to keep track of and currently the only way to know if you have done so is to check in the inspector for each node and see the icon indicating you can reset the property.

Describe the feature / enhancement and how it helps to overcome the problem or limitation

Having a similar icon with similar functionality in the Scene Tree itself would go a long way to improving usability. To prevent accidental changes a confirmation window can be shown.

Describe how your proposal will work, with code, pseudo-code, mock-ups, and/or diagrams

If this enhancement will not be used often, can it be worked around with a few lines of script?

An editor plugin could be made with the same functionality but I think this would be an easy thing to implement.

Is there a reason why this should be core and not an add-on in the asset library?

This would not be a change to how Editable Children or their properties work, simply an editor usability improvement.

[Calinou]

To prevent accidental changes a confirmation window can be shown.

Ideally, this confirmation window should display a list of properties to be reverted as well (or a least a number of properties that will be reverted).