gui(settings): add a copy button for electrum server address

liana-gui/src/app/state/settings/bitcoind.rs

@@ -469,6 +469,7 @@ impl ElectrumSettings {
                     });
                 }
             }
+            view::SettingsEditMessage::Clipboard(text) => return clipboard::write(text),
             _ => {}
         };
         Command::none()

liana-gui/src/app/view/settings.rs

@@ -697,7 +697,14 @@ pub fn electrum<'a>(
         col_fields = col_fields.push(
             Row::new()
                 .push(Container::new(text(k).bold().small()).width(Length::Fill))
-                .push(text(v).small()),
+                .push(text(v.clone()).small())
+                .push(Space::with_width(10))
+                .push(
+                    Button::new(icon::clipboard_icon())
+                        .style(theme::Button::TransparentBorder)
+                        .on_press(SettingsEditMessage::Clipboard(v.to_string())),
+                )
+                .align_items(Alignment::Center),
         );
     }