reset custom fee slider value

Author: julian-CStack

lib/pages/send_view/send_view.dart

@@ -1087,7 +1087,10 @@ class _SendViewState extends ConsumerState<SendView> {
       ref.refresh(pIsExchangeAddress);
     });
     isCustomFee.addListener(() {
-      if (!isCustomFee.value) ethFee = null;
+      if (!isCustomFee.value) {
+        customFeeRate = 1;
+        ethFee = null;
+      }
     });
     hasFees = coin is! Epiccash && coin is! NanoCurrency && coin is! Tezos;
     _currentFee = 0.toAmountAsRaw(fractionDigits: coin.fractionDigits);

lib/pages_desktop_specific/my_stack_view/wallet_view/sub_widgets/desktop_send.dart

@@ -1666,6 +1666,7 @@ class _DesktopSendState extends ConsumerState<DesktopSend> {
             onCustomFeeSliderChanged: (value) => customFeeRate = value,
             onCustomFeeOptionChanged: (value) {
               isCustomFee = value;
+              customFeeRate = 1;
               ethFee = null;
             },
             onCustomEip1559FeeOptionChanged: (value) => ethFee = value,