In Compare and Survey the selection holds both photos on screen, so the
Info panel's colour-label swatches and stars (and the Set Color Label
context menu) applied to the whole selection, while the bottom bar and the
rating/label keys act on the active photo only. They now go through
compare::target_active like the bottom bar does.
The culling panes' captions showed stars and flags but not the colour
label, so labelling there looked like it did nothing; each caption now
shows the label as a dot.
Bruno-Alumn
f16c6ef07f