allow to select multi folder to load

closes #74 (closed)

User can use cmd/ctrl + click to select multi folders to load data or detect channels in Channel Preferences Dialog

sohstationviewer/view/channel_prefer_dialog.py

@@ -464,7 +464,8 @@ class ChannelPreferDialog(OneWindowAtATimeDialog):
                 if widget is not None:
                     widget.setParent(None)
             self.channel_info = read_mseed_channels(
-                self.tracking_info_text_browser, self.list_of_dir, is_multiplex)
+                self.tracking_info_text_browser,
+                self.list_of_dir, is_multiplex)
             if len(self.channel_info) == 0:
                 msg = "No data can be read from " + ', '.join(self.list_of_dir)
                 return QtWidgets.QMessageBox.warning(self, "No data", msg)