Implementation of the delegation part of HP management

Requires: !312 (merged)

clive/__private/ui/operations/hive_power_management/power_down/power_down.py

@@ -153,7 +153,7 @@ class PowerDown(TabPane, OperationActionBindings):
     def compose(self) -> ComposeResult:
         with ScrollablePart():
             yield HpVestsFactor(self.provider)
-            yield SectionTitle("Perform a power down (transfer to vesting)")
+            yield SectionTitle("Perform a power down (withdraw vesting)")
             with Horizontal(id="input-with-button"):
                 yield self._shares_input
                 yield GenerousButton(self._shares_input, self._get_shares_balance)  # type: ignore[arg-type]