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/cli/commands/configure/watched_account.py

@@ -17,7 +17,7 @@ class AddWatchedAccount(ProfileBasedCommand):
             raise CLIPrettyError(f"Can't use this account name: {humanize_validation_result(result)}", errno.EINVAL)
 
     async def _run(self) -> None:
-        self.profile.accounts.add_tracked_account(self.account_name)
+        self.profile.accounts.watched.add(self.account_name)
 
 
 @dataclass(kw_only=True)