Find in Files does not remember File pattern

In previous versions of QtCreator, Find in Files would remember the last used file pattern even after shutdown.

Now it does not. It always defaults to "*.h". It gets remembered during the session, but defaults to *.h after exiting QtCreator.

Steps to reproduce:

1. Open find in Files (Ctrl + Shift + F)
2. Change the File Pattern, e.g. set it to "*"
3. Close QtCreator
4. Open QtCreator
5. Open find in Files (Ctrl + Shift + F) again
6. File Pattern will be set back to *.h