key accelerators: fix a few potential NULL pointer references. fixes #9632
Clarify that our linear RGB is Rec709
Fix some minor mem leaks due to metadata handling

This should even work if we ever allow more than one result per tag
Update French translation.
Deflicker (port from Magic Lantern): WIP
GUI is ok
Remove useless cast
It works!
Still WIP
Preliminary implementation of full-size histogram
GUI is (back to) ok
Works like never before!
Refactored histogram code
Refactor Deflicker code inside iop
Small GUI tuning
Implemented legacy_params
Use real b/w points from original raw data
No need to use image cache
Deflicker Auto: GUI
Presets. New (better!) default params. GUI fixes.