Display the full size photo when viewing at larger than the max preview size.

[spyro1248]

Is your feature request related to a problem? Please describe.
It is immensly frustrating that when previews are not larger than the full size of photos, the original image is not shown

Describe the solution you'd like
When viewing a photo, if the largest preview is too small, show the original photo.

Describe alternatives you've considered
Using the memories app, which does this correctly.

Additional context
The current behaviour of only showing the largest preview is hopeless when previews are limited in size (eg. on a low resource box)

This is also counter to the behaviour of every single photo viewer ever written in the history of photo viewers. Frankly, it's just bizarre.

At the very least, can this be an option in the settings, for those of us unlucky enough not to be running nextcloud on a datacentre-scale machine?