[Feature 🚀]: Color theme for section only

[KOT040188]

When I select a color theme for a section in the sidebar, I expect to see that section's icon and task list in that color. But instead, the whole interface of kuro is painted in this color. This is not what I expect to see, it confuses me. When navigating through sections, it is not the color of the sections that changes, but the color of the entire interface. I suggest fixing this, or at least making it possible to configure this in the settings.

[davidsmorais]

Thanks for your suggestion 👍
Personally, I like having the whole UI in the current list's color as it "reminds" me where I am, and it was simpler to implement than to target the non-relevant text items. But I guess we can re-add the "list colors" option & shortcut in the future if more people ask for it