[ivette] Dark mode completed (almost)

ivette/src/colors/dark-code.css

ivette/src/colors/dark.css

ivette/src/colors/light.css

ivette/src/dome/renderer/controls/style.css

ivette/src/dome/renderer/frame/style.css

ivette/src/dome/renderer/frame/toolbars.tsx

ivette/src/dome/renderer/layout/style.css

ivette/src/dome/renderer/style.css

ivette/src/frama-c/kernel/ASTinfo.tsx

ivette/src/frama-c/kernel/style.css

ivette/src/frama-c/plugins/eva/style.css

ivette/src/ivette/prefs.tsx

ivette/src/renderer/Controller.tsx

ivette/src/renderer/style.css