The Idea is to update the default names of the generated screen actions (I.E when clicking a newly inserted button, ETC) 

I think it would be better if it was named = 'OnClick_Button'. That way if we have a lot of actions inside a screen/block. It will be arranged neatly based on what the action will do. 

Here are some of my default naming suggestions:

On After Fetch = OnAfterFetch_<Name>

Event Handler = Handler_<Name>

Etc

Basically make the action as a prefix instead of a suffix

Example

 Looks good right?