multiundocommand: keep undo/redo under protected

Minor code improvement

app/node/block/block.h

@@ -148,6 +148,11 @@ public:
     return GetStandardValue(kSpeedInput).toDouble();
   }
 
+  void set_speed(double s)
+  {
+    SetStandardValue(kSpeedInput, s);
+  }
+
   bool reverse() const
   {
     return GetStandardValue(kReverseInput).toBool();

app/node/node.cpp

@@ -2343,7 +2343,7 @@ void NodeSetPositionAsChildCommand::redo()
     }
   }
 
-  sub_command_->redo();
+  sub_command_->redo_now();
 }
 
 void NodeSetPositionToOffsetOfAnotherNodeCommand::redo()

app/node/node.h

@@ -1406,7 +1406,7 @@ protected:
 
   virtual void undo() override
   {
-    sub_command_->undo();
+    sub_command_->undo_now();
   }
 
 private:

app/node/project/folder/folder.cpp

@@ -168,7 +168,7 @@ void Folder::RemoveElementCommand::redo()
   }
 
   if (subcommand_) {
-    subcommand_->redo();
+    subcommand_->redo_now();
   }
 }
 

app/node/project/folder/folder.h

@@ -145,7 +145,7 @@ public:
     virtual void undo() override
     {
       if (subcommand_) {
-        subcommand_->undo();
+        subcommand_->undo_now();
       }
     }