Simplify the WKClone source/dest selection

Only show confirmation #2 if using advanced partition selection.

scripts/wk/hw/ddrescue.py

@@ -740,10 +740,17 @@ class State():
     self.update_top_panes()
 
     # Confirmation #1
-    self.confirm_selections(
-      prompt='Are these selections correct?',
-      source_parts=source_parts,
-      )
+    advanced_selection = False
+    try:
+      self.confirm_selections(
+        prompt='Are these selections correct? (use "No" for advanced selection)',
+        source_parts=source_parts,
+        )
+    except std.GenericAbort:
+      if std.ask('Proceed to advanced partition selection?'):
+        advanced_selection = True
+      else:
+        raise
 
     # Update panes
     self.update_progress_pane('Idle')
@@ -762,11 +769,18 @@ class State():
       clean_working_dir(self)
 
     # Add block pairs
-    if self.mode == 'Clone':
-      source_parts = self.add_clone_block_pairs()
+    if advanced_selection:
+      if self.mode == 'Clone':
+        source_parts = self.add_clone_block_pairs()
+      else:
+        source_parts = select_disk_parts(self.mode, self.source)
+        self.add_image_block_pairs(source_parts)
     else:
-      source_parts = select_disk_parts(self.mode, self.source)
-      self.add_image_block_pairs(source_parts)
+      if self.mode == 'Clone':
+        self._add_block_pair(
+          hw_obj.Disk(self.source.path),
+          pathlib.Path(self.destination.path),
+          )
 
     # Safety Checks #1
     if self.mode == 'Clone':
@@ -775,7 +789,8 @@ class State():
 
     # Confirmation #2
     self.update_progress_pane('Idle')
-    self.confirm_selections('Start recovery?')
+    if advanced_selection:
+      self.confirm_selections('Start recovery?')
 
     # Unmount source and/or destination under macOS
     if PLATFORM == 'Darwin':