Restart spend process according to current state

Spend process keeps its state if it is the first step.
User can click on Clear to reset if he wants.

gui/src/app/state/spend/step.rs

@@ -2,6 +2,7 @@ use std::{cmp::Ordering, collections::HashMap, str::FromStr, sync::Arc};
 
 use iced::{Command, Subscription};
 use liana::{
+    commands::ListCoinsEntry,
     descriptors::LianaDescriptor,
     miniscript::bitcoin::{
         address, psbt::Psbt, secp256k1, Address, Amount, Denomination, Network, OutPoint,
@@ -399,6 +400,19 @@ impl Step for DefineSpend {
                         self.batch_label.valid = label.len() <= 100;
                         self.batch_label.value = label;
                     }
+                    view::CreateSpendMessage::Clear => {
+                        *self = Self::new(
+                            self.network,
+                            self.descriptor.clone(),
+                            self.coins
+                                .iter()
+                                .map(|(c, _)| c.clone())
+                                .collect::<Vec<ListCoinsEntry>>()
+                                .as_slice(),
+                            self.timelock,
+                        );
+                        return Command::none();
+                    }
                     view::CreateSpendMessage::AddRecipient => {
                         self.recipients.push(Recipient::default());
                     }

gui/src/app/view/message.rs

@@ -38,6 +38,7 @@ pub enum CreateSpendMessage {
     SelectPath(usize),
     Generate,
     SendMaxToRecipient(usize),
+    Clear,
 }
 
 #[derive(Debug, Clone)]

gui/src/app/view/mod.rs

@@ -98,7 +98,7 @@ pub fn sidebar<'a>(menu: &Menu, cache: &'a Cache) -> Container<'a, Message> {
     let spend_button = if *menu == Menu::CreateSpendTx {
         row!(
             button::menu_active(Some(send_icon()), "Send")
-                .on_press(Message::Menu(Menu::CreateSpendTx))
+                .on_press(Message::Reload)
                 .width(iced::Length::Fill),
             menu_green_bar()
         )

gui/src/app/view/spend/mod.rs

@@ -294,7 +294,7 @@ pub fn create_spend_tx<'a>(
                     .push(Space::with_width(Length::Fill))
                     .push(
                         button::primary(None, "Clear")
-                            .on_press(Message::Menu(Menu::CreateSpendTx))
+                            .on_press(Message::CreateSpend(CreateSpendMessage::Clear))
                             .width(Length::Fixed(100.0)),
                     )
                     .push(