qml: update UI after import key/address, add icon to address/key import dialog

electrum/gui/qml/components/ImportAddressesKeysDialog.qml

@@ -102,6 +102,7 @@ ElDialog {
 
         FlatButton {
             Layout.fillWidth: true
+            icon.source: '../../icons/add.png'
             text: qsTr('Import')
             enabled: valid
             onClicked: doAccept()

electrum/gui/qml/qewallet.py

@@ -704,10 +704,12 @@ class QEWallet(AuthMixin, QObject, QtEventListener):
     @pyqtSlot(str)
     def importAddresses(self, addresslist):
         self.wallet.import_addresses(addresslist.split())
+        self.dataChanged.emit()
 
     @pyqtSlot(str)
     def importPrivateKeys(self, keyslist):
         self.wallet.import_private_keys(keyslist.split(), self.password)
+        self.dataChanged.emit()
 
     @pyqtSlot(str)
     def importChannelBackup(self, backup_str):