Zoom indicator is not updated when changing picture

[Perfja]

Steps to reproduce (version: 1.0.2, windows):

1. Set zoom indicator to visible.
2. Open an image (with other images in the same folder).
3. Zoom in.
4. Go the next image (which must be smaller than window size, otherwise qimgv will automatically "zoom out" and therefore set the zoom indicator correctly).

The zoom indicator shows the same value, even though it should be updated to 100%.