some import clean-up in qt

electrum/gui/qt/contact_list.py

@@ -24,14 +24,16 @@
 # SOFTWARE.
 import webbrowser
 
-from electrum.i18n import _
-from electrum.bitcoin import is_address
-from electrum.util import block_explorer_URL
-from electrum.plugin import run_hook
 from PyQt5.QtGui import *
 from PyQt5.QtCore import *
 from PyQt5.QtWidgets import (
     QAbstractItemView, QFileDialog, QMenu, QTreeWidgetItem)
+
+from electrum.i18n import _
+from electrum.bitcoin import is_address
+from electrum.util import block_explorer_URL
+from electrum.plugin import run_hook
+
 from .util import MyTreeWidget, import_meta_gui, export_meta_gui