Refactor Cart into checkerboard table

Closes: #173 (closed)

Removes clear all feature from: #233

This one improves focus behavior in the cart, moving cart items and deleting items from the cart.

clive/__private/core/error_handlers/communication_failure_notificator.py

@@ -76,4 +76,7 @@ class CommunicationFailureNotificator(ErrorNotificator[CommunicationError]):
 
     @staticmethod
     def _get_communication_timeout_message(exception: CommunicationTimeoutError) -> str:
-        return str(exception)
+        return (
+            f"Timeout occurred during communication with {exception.url}."
+            f" Took over {exception.timeout_secs:.2f} seconds."
+        )