Revert "Address the poor performance of the existing unique-name generation (#17944)"

This reverts commit 83202d8ad6.

# Conflicts:
#	src/Base/Tools.cpp
#	src/Base/Tools.h

src/App/ExtensionContainer.cpp

@@ -176,13 +176,6 @@ void ExtensionContainer::getPropertyMap(std::map<std::string, Property*>& Map) c
         entry.second->extensionGetPropertyMap(Map);
     }
 }
-void ExtensionContainer::visitProperties(std::function<void(Property*)> visitor) const
-{
-    App::PropertyContainer::visitProperties(visitor);
-    for(const auto &entry : _extensions) {
-        entry.second->extensionVisitProperties(visitor);
-    };
-}
 
 Property* ExtensionContainer::getPropertyByName(const char* name) const
 {