As I review and tweak various aspects of GIMP UI, I also write down
specifications for these subparts. Here is one for the locks behaviors.
We worked on these specifications with Aryeom and tried to make the most
useful and also somehow obvious logics for these locks, in particular
the cases when applied to layer groups which can have wider ranges of
meaning (on leaf items, it is much simpler). The various previous
commits are implemented based on these specifications.
XCF 17 includes the new visibility locks and the ability to add position
and alpha locks on layer groups.
I am going to push the various commits implementing these different
features together which is why we gather them as a single XCF version.
