Add delay to TUI() initialization

Avoids issue where the main menu is printed before the layout is fully
set causing the first few lines to be hidden by the title pane.

scripts/wk/ui/tui.py

@@ -211,6 +211,9 @@ class TUI():
         ),
       ))
 
+    # Done
+    sleep(0.2)
+
   def remove_all_info_panes(self) -> None:
     """Remove all info panes and update layout."""
     self.layout['Info'].pop('height', None)