Qml project runs the wrong <Current File> after "Save As..."

To reproduce:

1. Use a .qmlproject with no mainFile specified, where the project is configured to run the <Current File>. Assume one file in the project, named Main.qml
2. Use "Save As..." to save Main.qml as Main2.qml. Main2.qml will become active in the editor.
3. Make changes to Main2.qml.
4. Run. Main.qml will be run instead of Main2.qml.

Entering a different file and then returning to Main2.qml fixes the issue.