Incorrect balance aggregation for consolidations

[valefar-on-discord]

When you consolidate validators, the entire balance of the source validator does not necessarily get transferred to the target. It's a bit more complicated:

Spec

        # Calculate the consolidated balance
        source_effective_balance = min(
            state.balances[pending_consolidation.source_index], source_validator.effective_balance
        )

Any balance remaining is handled via the normal sweep cycle and is sent to the withdrawal address.

The problem is the Launchpad UX suggests to the user the entire balance is swept to the target and should be fixed.