UI improvements and initial loading screen color

src/App.tsx

@@ -34,6 +34,13 @@ const App: Component = () => {
       import('./views/PriorityView');
       import('./views/MatrixView');
       import('./views/SettingsView');
+
+      // Remove splash screen after high priority work is done
+      const splash = document.getElementById('splash');
+      if (splash) {
+        splash.style.opacity = '0';
+        setTimeout(() => splash.remove(), 500);
+      }
     });
   });