Add selector for theme manager preview
-:root {
+:root, .app-theme-picker__picker[data-theme=none] {
// Font related properties
--font-family-sans: -apple-system, blinkmacsystemfont, "Segoe UI", roboto, "Noto Sans", oxygen, ubuntu, cantarell, "Fira Sans", "Droid Sans", "Helvetica Neue", arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
--font-family-mono: ui-monospace, SFMono-Regular, SF Mono, JetBrainsMono, Consolas, monospace;
