so generaly it gets very difficult to keep track of your palettes, especially when you have a big list, so i wish the palette you are currently using would apper at the top of the list, with its name and all, it would also be very good to do the same to which palette is set as your default palette.
simple small request.
that is a great idea I hope they add it like a drop down option between alphabetical or most recent used (like you said). That way people can decide what works best for their workflow 
Add a reference to this feature to Improve Palette Picker · Issue #2365 · aseprite/aseprite · GitHub, which include other feature requests (recent list of palettes / grouping palettes)