Show dialogs instead of operation summary screens

clive/__private/ui/dialogs/operation_summary/__init__.py

...dialogs/operation_summary/account_witness_proxy_dialog.py

.../ui/dialogs/operation_summary/cancel_power_down_dialog.py

.../operation_summary/cancel_transfer_from_savings_dialog.py

...ialogs/operation_summary/operation_summary_base_dialog.py

...logs/operation_summary/operation_summary_base_dialog.scss

.../ui/dialogs/operation_summary/remove_delegation_dialog.py

...operation_summary/remove_withdraw_vesting_route_dialog.py

.../screens/operations/bindings/operation_action_bindings.py

...i/screens/operations/governance_operations/proxy/proxy.py

...wer_management/delegate_hive_power/delegate_hive_power.py

...operations/hive_power_management/power_down/power_down.py

.../hive_power_management/withdraw_routes/withdraw_routes.py

...screens/operations/operation_summary/operation_summary.py

...reens/operations/operation_summary/operation_summary.scss

...reens/operations/savings_operations/savings_operations.py

tests/tui/test_savings.py