Minor cleanup and removal of stale comments.

Also attempts to fix a focus-loss bug on GTK after zone dialog.

Fixes https://gitlab.com/kicad/code/kicad/-/issues/13221

pcbnew/tools/drawing_tool.cpp

@@ -2582,9 +2582,10 @@ int DRAWING_TOOL::DrawZone( const TOOL_EVENT& aEvent )
             }
             else
             {
+                m_frame->PopTool( aEvent );
+
                 // We've handled the cancel event.  Don't cancel other tools
                 evt->SetPassEvent( false );
-                m_frame->PopTool( aEvent );
                 break;
             }
         }

pcbnew/tools/zone_create_helper.cpp

@@ -122,19 +122,16 @@ std::unique_ptr<ZONE> ZONE_CREATE_HELPER::createNewZone( bool aKeepout )
 
         if( m_params.m_keepout )
             dialogResult = InvokeRuleAreaEditor( frame, &zoneInfo );
-        else
-        {
-            // TODO(JE) combine these dialogs?
-            if( ( zoneInfo.m_Layers & LSET::AllCuMask() ).any() )
+        else if( ( zoneInfo.m_Layers & LSET::AllCuMask() ).any() )
             dialogResult = InvokeCopperZonesEditor( frame, &zoneInfo );
         else
             dialogResult = InvokeNonCopperZonesEditor( frame, &zoneInfo );
-        }
 
         if( dialogResult == wxID_CANCEL )
             return nullptr;
 
         controls->WarpMouseCursor( controls->GetCursorPosition(), true );
+        frame->GetCanvas()->SetFocus();
     }
 
     wxASSERT( !m_tool.m_isFootprintEditor || ( parent->Type() == PCB_FOOTPRINT_T ) );
@@ -294,6 +291,14 @@ bool ZONE_CREATE_HELPER::OnFirstPoint( POLYGON_GEOM_MANAGER& aMgr )
 
 void ZONE_CREATE_HELPER::OnGeometryChange( const POLYGON_GEOM_MANAGER& aMgr )
 {
+    // Handle a cancel-interactive
+    if( m_zone && !aMgr.IsPolygonInProgress() )
+    {
+        m_zone = nullptr;
+        m_parentView.SetVisible( &m_previewItem, false );
+        return;
+    }
+
     // send the points to the preview item
     m_previewItem.SetPoints( aMgr.GetLockedInPoints(), aMgr.GetLeaderLinePoints(),
                              aMgr.GetLoopLinePoints() );