Full UI overhaul and new features

After some time user testing the Color Composer, I have finally reached a point where I can say that the thing is somewhat usable for human beings.

Apart from big UI changes I have added a few export options for the colors. Saving image doesn't work for reasons I haven't as of yet figured out. Other than that, there are few convenient text export formats that should cover most uses with slight reformatting.

I welcome any further suggestions on ways to improve the application.