[Task]: Remove the need to call the PropsUi.setLook()

### What needs to happen?

migration: https://issues.apache.org/jira/browse/HOP-3829

I'd like to remove the need to call the PropsUi.setLook() method when creating each widget.

I have a proposal for a new method PropsUi.setTheme() which is processes the whole widget tree. 

No need to use the setLook() method anymore in action and transform plugins, except when dynamically adding widgets during execution (tab In/out for webservice). 

### Issue Priority

Priority: 3

### Issue Component

Component: API

Start with migration HOP-3829 and trace how PropsUi.setLook() is called while action and transform plugins create widgets. Evaluate the proposed PropsUi.setTheme() behavior across the whole widget tree, preserving setLook() only for dynamically added widgets such as the webservice tab In/out controls. Done means ordinary widget creation no longer requires setLook().

Written by the indexing model from the issue text.