criada a tela attendance_list_screen.dart, about_screen.dart e main_procedures_screen.dart

lib/widgets/icon_button_default.dart

@@ -4,17 +4,19 @@ import 'package:rkm/utils/color_palette.dart';
 class IconButtonDefault extends StatelessWidget {
   var onPressed;
   IconData icon;
+  Color color;
 
   IconButtonDefault({
     required this.icon,
     required this.onPressed,
+    this.color = ColorPalette.black54
 });
 
   @override
   Widget build(BuildContext context) {
     return IconButton(
         onPressed: onPressed,
-        icon: Icon(icon,color: ColorPalette.black54,size: 30,)
+        icon: Icon(icon,color: color,size: 30,)
     );
   }
 }