Fixed url launch

lib/screens/settings/components/report_issue/widget_list_tile_report_issue.dart

@@ -13,7 +13,10 @@ class ReportIssueListTile extends StatelessWidget {
       leading: const Icon(Icons.bug_report),
       title: Text(S.of(context).reportIssue),
       onTap: () {
-        launchUrl(Uri.parse(context.read<Environment>().issuesReportUrl));
+        launchUrl(
+          Uri.parse(context.read<Environment>().issuesReportUrl),
+          mode: LaunchMode.externalApplication,
+        );
       },
     );
   }

lib/screens/settings/components/source_code/widget_list_tile_source_code.dart

@@ -13,7 +13,10 @@ class SourceCodeListTile extends StatelessWidget {
       leading: const Icon(Icons.code),
       title: Text(S.of(context).sourceCode),
       onTap: () {
-        launchUrl(Uri.parse(context.read<Environment>().sourceCodeUrl));
+        launchUrl(
+          Uri.parse(context.read<Environment>().sourceCodeUrl),
+          mode: LaunchMode.externalApplication,
+        );
       },
     );
   }

lib/screens/settings/components/write_email/widget_list_tile_write_email.dart

@@ -14,7 +14,9 @@ class WriteEmailListTile extends StatelessWidget {
       title: Text(S.of(context).writeEmail),
       onTap: () {
         launchUrl(
-            Uri.parse('mailto:${context.read<Environment>().contactEmail}?subject=M3 Lightmeter'));
+          Uri.parse('mailto:${context.read<Environment>().contactEmail}?subject=M3 Lightmeter'),
+          mode: LaunchMode.externalApplication,
+        );
       },
     );
   }