Instead of no-icon, indicate layer/channel/path/tool invisibility with eye-shut icon, no-iris-eye icon or well-delimited area in list
Submitted by Andrew
Layer/channels/Path dialog and Preference > Interface > toolbox should have a closed eye icon to indicate that the layer/channel/path/tool is invisible.
Currently in the paths dialog you have no idea that you can check the visibility of paths until you select or hover over them in most themes. There just this weird empty space in the dialog.
You can't just add the closed eye to the paths dialog because this would make the rest of GIMP very inconsistent. So to keep GIMP consistent the closed eye should be added to all these places.
This is how Inkscape, Mypaint, Krita and other apps present an invisible layers among other things. So users that are familiar with those apps will immediately know how GIMP works.
Version: git master