No image collection for .cr2 raw files
When opening a single .cr2 raw file inside of a directory with many .cr2 files, there is no image collection like it's the case for JPEGs. The 'Image Collection' and 'Diashow' menu entries are disabled and the left and right arrow keys do nothing.
Is there a reason why this isn't supported for these raw files?
I'm using version
3.28.4-1 from ubuntu cosmic repositories.
I can try building the latest master if you think that changes something.