Remove pane focused event in favor of focus_in at the workspace level
Added is_child to ViewContext to determine if a given view is a child of the current view
Fix issue where dock would get in a infinite loop when activated after dragging an item out of it
Fix issue where the last focused view in an item was not correctly refocused when a pane is focused after switching active tabs

Co-Authored-By: Mikayla Maki <mikayla@zed.dev>