fix(HtmlParser): correctly remove an item from the space struct when requested from a callback

while here:
- implement the removing algorithm for the compact_mode

src/space/space.cpp

@@ -5,7 +5,7 @@
  */
 
 /* 
- * Copyright (c) 2008-2023, Tomasz Sowa
+ * Copyright (c) 2008-2024, Tomasz Sowa
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without
@@ -2223,6 +2223,21 @@ void Space::remove(const std::wstring & field)
 }
 
 
+void Space::remove(ObjectType::iterator & iterator)
+{
+	if( type == type_object )
+	{
+		if( iterator != value.value_object.end() )
+		{
+			delete iterator->second;
+			iterator->second = nullptr;
+
+			value.value_object.erase(iterator);
+		}
+	}
+}
+
+
 void Space::remove(size_t table_index)
 {
 	if( type == type_table && table_index < value.value_table.size() )