ignore ._ files created by macOS

[attero]

macOS has the creates ._ files to store extra metadata on filesystems without extended attribute support like FAT32 / exFAT.
These files still get picked up by qView when changing between images, but don't contain any image data, so nothing gets displayed, you get an error message:

Error occurred opening "._example.jpeg": Unable to read image data (Error 4)

Please ignore ._ files by default.

Thank you!