#23 Upgrade MaterialUI

General UI improvements and cleanup

lib/theming/lightAppTheme.dart

@@ -4,39 +4,10 @@ class LightAppTheme {
   static const Color marianumRed = Color.fromARGB(255, 153, 51, 51);
 
   static final theme = ThemeData(
-    useMaterial3: false,
     brightness: Brightness.light,
-    primaryColor: marianumRed,
-
-    colorScheme: const ColorScheme(
-      brightness: Brightness.light,
-
-      surface: Colors.white,
-      onSurface: Colors.black,
-
-      secondary: Colors.grey,
-      onSecondary: Colors.white,
-
-      primary: marianumRed,
-      onPrimary: Colors.white,
-
-      background: Colors.white,
-      onBackground: Colors.black,
-
-      error: marianumRed,
-      onError: marianumRed,
-    ),
-    inputDecorationTheme: const InputDecorationTheme(
-      border: UnderlineInputBorder(borderSide: BorderSide(color: marianumRed)),
-    ),
-    appBarTheme: const AppBarTheme(
-      backgroundColor: marianumRed,
-    ),
-    progressIndicatorTheme: const ProgressIndicatorThemeData(
-      color: marianumRed,
-    ),
-    checkboxTheme: CheckboxThemeData(
-      fillColor: MaterialStateProperty.resolveWith((states) => states.contains(MaterialState.selected) ? marianumRed : Colors.transparent),
-    ),
+    colorScheme: ColorScheme.fromSeed(seedColor: marianumRed),
+    floatingActionButtonTheme: const FloatingActionButtonThemeData(
+      foregroundColor: Colors.white
+    )
   );
 }