private Component getNextGroupComponent(Component component, List<Component> list) {
			Component sibling = findSibling(component, list);
			if (sibling == null) {
				return list.get(0);
			}
			return getNext(sibling, list);
		}
Find a sibling of the given component and get the component after the sibling.  We can do
this since we have guilty knowledge that the few focusable components not in the 
traversal list have siblings that are.  In that case, all siblings represent the focused
group.  This will move to the next component after that group.

@param component the component used to find the next component
@param list the list of traversal components
@return the next component
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/compositeeditor/CompositeEditorPanel.java