Add support for fill layers
Submitted by Jon..@..gy.net
Something that could be useful is "fill layers": A layer that contains only a single color, or a pattern, or a gradient. It looks like a normal layer completely filled in with that color/pattern/gradient; however, you can double-click it in the Layers palette, change the color/pattern/gradient settings, and it updates automatically. And it can have layer masks or clipping paths added to it like normal layers.
Photoshop's "Shape layers" are just fill layers with clipping paths. So if you implement this, and clipping paths (bug #131982), then you could just add a path stroking capability (similar to bug #136322) and you have vector layers.