AUP3: Fix macro path handling

Aside from the breakage I added to it during the AUP3 conversion,
there was several other issues discovered in regards to how the
export paths were being handled.

src/commands/ImportExportCommands.cpp

@@ -48,7 +48,7 @@ void ImportCommand::PopulateOrExchange(ShuttleGui & S)
 }
 
 bool ImportCommand::Apply(const CommandContext & context){
-   return ProjectFileManager::Get( context.project ).Import(mFileName);
+   return ProjectFileManager::Get( context.project ).Import(mFileName, nullptr, false);
 }