WIP Feature: Option to display layer info subtitles

[TheTwo]

@dreamkeeper

Btw: we should get rid of the “100% Copy” display on filter masks as well, as those cannot be changed anyway. However, there’s a little problem with filter layers, as the default here is “Copy” but can be changed - so, not sure, what to do with these… Personally I’d like “Copy” to be treated the same as “Normal”.

“Copy” and “normal” are very different:

How is the Copy blending mode practically different from Normal?

Copy-vs-Normal is mostly noticeable when having semi-transparent areas. The deform brush in particular behaves completely differently on semi-transparent areas in copy and normal mode.