Two more, almost everything is set to be translate

Two more, almost everything is set to be translated. Now the Classic and Lite mode are fully translated. If there anything missing I'll catch it up while digging into the code or using the app.

lib/gui_lite.py

@@ -88,7 +88,8 @@ def load_theme_paths():
 
 def csv_transaction(wallet):
     try:
-        fileName = QFileDialog.getSaveFileName(QWidget(), 'Select file to export your wallet transactions to', os.path.expanduser('~/electrum-history.csv'), "*.csv")
+        select_export = _('Select file to export your wallet transactions to')
+        fileName = QFileDialog.getSaveFileName(QWidget(), select_export, os.path.expanduser('~/electrum-history.csv'), "*.csv")
         if fileName:
             with open(fileName, "w+") as csvfile:
                 transaction = csv.writer(csvfile)
@@ -126,7 +127,8 @@ def csv_transaction(wallet):
                     transaction.writerow([tx_hash, label, confirmations, value_string, fee_string, balance_string, time_string])
                 QMessageBox.information(None,"CSV Export created", "Your CSV export has been successfully created.")
     except (IOError, os.error), reason:
-        QMessageBox.critical(None,"Unable to create csv", "Electrum was unable to produce a transaction export.\n" + str(reason))
+        export_error_label = _("Electrum was unable to produce a transaction export.")
+        QMessageBox.critical(None,"Unable to create csv", export_error_label + "\n" + str(reason))
 
 
 class ElectrumGui(QObject):