qml: correctly update channel list after channel backup import, and correctly delete channel backup

electrum/gui/qml/qechanneldetails.py

@@ -199,7 +199,10 @@ class QEChannelDetails(QObject, QtEventListener):
 
     @pyqtSlot()
     def deleteChannel(self):
-        self._wallet.wallet.lnworker.remove_channel(self._channel.channel_id)
+        if self.isBackup:
+            self._wallet.wallet.lnworker.remove_channel_backup(self._channel.channel_id)
+        else:
+            self._wallet.wallet.lnworker.remove_channel(self._channel.channel_id)
 
     @pyqtSlot(result=str)
     def channelBackup(self):

electrum/gui/qml/qechannellistmodel.py

@@ -41,6 +41,11 @@ class QEChannelListModel(QAbstractListModel, QtEventListener):
         if wallet == self.wallet:
             self.on_channel_updated(channel)
 
+    @qt_event_listener
+    def on_event_channels_updated(self, wallet):
+        if wallet == self.wallet:
+            self.init_model()
+
     def on_destroy(self):
         self.unregister_callbacks()