Add release_children_focus to Control

[InkONat]

Describe the project you are working on

Level editor, uses a lot of Control nodes

Describe the problem or limitation you are having in your project

No single method to release the focus of all children and subchildren of a Control node

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

A simple method that goes through the children of the Control node and releases their focus. Could be called release_children_focus, unfocus_all_children, etc. I don't think it should unfocus itself as well, but that could be a parameter for the method (something like release_children_focus ( release_self : bool )

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

The method could call release_focus on all of the children nodes of the Control node that called the method

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

propagante_call("release_focus") works, but for beginners it would be more intuitive to have a function for it

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

Control node is core

[sockeye-d]

I think you could do

propagate_call("release_focus")

[InkONat]

I think that can work, but a method for it is more intuitive and easier to use, I will update the issue to include that though