null safety

lib/pages/faq/faq_edit_page.dart

@@ -10,6 +10,7 @@ import 'package:fcs/pages/widgets/local_text.dart';
 import 'package:fcs/pages/widgets/progress.dart';
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
+import 'package:flutter_vector_icons/flutter_vector_icons.dart';
 import 'package:provider/provider.dart';
 
 const info = "Select additional page";

lib/pages/faq/widgets.dart

@@ -7,14 +7,14 @@ Widget itemTitle(BuildContext context, String textKey) {
   return Padding(
     padding: const EdgeInsets.only(left: 18.0, top: 15, bottom: 0),
     child: Text(
-      AppTranslations.of(context).text(textKey),
+      AppTranslations.of(context)!.text(textKey),
       style: TextStyle(
           fontWeight: FontWeight.bold, fontSize: 18, color: Colors.black),
     ),
   );
 }
 
-Widget subItemTitle(BuildContext context, String textKey, {IconData iconData}) {
+Widget subItemTitle(BuildContext context, String textKey, {IconData? iconData}) {
   return Padding(
     padding: const EdgeInsets.only(left: 0, top: 0, bottom: 0),
     child: Row(
@@ -25,7 +25,7 @@ Widget subItemTitle(BuildContext context, String textKey, {IconData iconData}) {
         ),
         SizedBox(width: 10),
         Text(
-          AppTranslations.of(context).text(textKey),
+          AppTranslations.of(context)!.text(textKey),
           style: TextStyle(
               fontWeight: FontWeight.w700, fontSize: 15, color: primaryColor),
         ),
@@ -35,7 +35,7 @@ Widget subItemTitle(BuildContext context, String textKey, {IconData iconData}) {
 }
 
 Widget contactItem(BuildContext context, String text, IconData iconData,
-    {Function() onTap, String labelKey}) {
+    {Function()? onTap, String? labelKey}) {
   return Material(
     child: Padding(
       padding: const EdgeInsets.only(left: 18.0, bottom: 10, right: 18),