Although work on the skill tree is still in progress, skills UI panel is ready. Actually, it was ready long time ago, and now I just improved it with my latest UI components like layered icons and general-purpose selectors, changed a bit elements layout and visual design and added couple of features such as tree scaling and skill params display. One of such features is sync between skill action, description and params: if a skill gives 10% to something, the description and params will also show 10%. And when I need to change it to 15% - description changes as well. This way I reduce my chances to screw up with skill descriptions in future.