A manual "git add" with an open "git commit" dialog leads to all untracked files being listed there

1. Open some project in Qt Creator that's managed by git
2. Make some changes and do git->commit
-> Only the list of changed files will appear in the dialog, as expected.
3. Do from the command line "git add" on some untracked file.
-> Now all untracked files in the project repo will appear in the commit dialog.