Try to flicker less when redrawing lists

gui/display.py

@@ -185,8 +185,10 @@ class Display(wx.ListCtrl):
             self.Select(row, True)
 
     def populate(self, stuff):
-
         if stuff is not None:
+            wasFrozen = self.IsFrozen()
+            if not wasFrozen:
+                self.Freeze()
             listItemCount = self.GetItemCount()
             stuffItemCount = len(stuff)
 
@@ -203,11 +205,15 @@ class Display(wx.ListCtrl):
                     for i in range(listItemCount - stuffItemCount):
                         self.DeleteItem(self.getLastItem())
                     self.Refresh()
+            if not wasFrozen:
+                self.Thaw()
 
     def refresh(self, stuff):
         if stuff is None:
             return
-
+        wasFrozen = self.IsFrozen()
+        if not wasFrozen:
+           self.Freeze()
         item = -1
         for id_, st in enumerate(stuff):
 
@@ -259,6 +265,8 @@ class Display(wx.ListCtrl):
                         self.SetColumnWidth(i, headerWidth)
                 else:
                     self.SetColumnWidth(i, col.size)
+        if not wasFrozen:
+            self.Thaw()
 
     def update(self, stuff):
         self.populate(stuff)