Fixes issue with ACE displaying only banks (#1427)

Updates to some AzCore functions a while ago made some path functions
strip off a trailing slash, which caused bad paths to be used when
loading middleware data.  Updated the code to use better path APIs.

Gems/AudioSystem/Code/Source/Editor/AudioControlsEditorWindow.cpp

@@ -218,7 +218,7 @@ namespace AudioControls
         IAudioSystemEditor* pAudioSystemImpl = CAudioControlsEditorPlugin::GetAudioSystemEditorImpl();
         if (pAudioSystemImpl)
         {
-            StartWatchingFolder(pAudioSystemImpl->GetDataPath());
+            StartWatchingFolder(pAudioSystemImpl->GetDataPath().LexicallyNormal().Native());
             m_pMiddlewareDockWidget->setWindowTitle(QString(pAudioSystemImpl->GetName().c_str()) + " Controls");
         }
     }