A list box's items and a tab control's tabs are views, patched by key as a
column's children are: Panel.Children and ItemsControl.Items are both an
IList, so one patch serves both. A list can choose an item only once its
items are there, so the choice is set after the children.
A routed event bubbles, so each handler now takes only its own control's
events. Before, a dropdown in a list item would have been heard as the
list's choice too.
paint gives any view a text and a background colour, and border a frame. A
colour that cannot be read leaves the theme's.
🤖 Generated with [ECA](https://eca.dev) (anthropic/claude-opus-4-8)
Co-Authored-By: eca-agent <git@eca.dev>
