do a better job of not inserting null where gtk expects a string

buypeeb.py

@@ -131,7 +131,7 @@ class BuypeebApp:
 		msgbox.destroy()
 		return response
 
-	def entryBox(self, title, text, allow_cancel = True):
+	def entryBox(self, title, text, allow_cancel = True, prefilled: str = ""):
 		# thanks to https://ardoris.wordpress.com/2008/07/05/pygtk-text-entry-dialog/
 		entrybox = Gtk.MessageDialog(
 			parent = self.window,
@@ -144,6 +144,7 @@ class BuypeebApp:
 
 		entrybox.set_markup(text)
 		entry = Gtk.Entry()
+		entry.set_text(prefilled)
 		entry.connect("activate", self.entryBoxResponse, entrybox, Gtk.ResponseType.OK) # allow for pressing enter instead of clicking OK
 
 		entrybox.vbox.pack_end(entry, True, True, 0)
@@ -173,7 +174,7 @@ class BuypeebApp:
 		# print(self.settings.watchlist)
 		for id, item in self.settings.watchlist.items():
 			if item.ready:
-				self.items.append([item.name, item.price_jpy(), item.price_aud(self.rate), "...", id])
+				self.items.append([item.name if item.name is not None else "", item.price_jpy(), item.price_aud(self.rate), "...", id])
 			else:
 				name = item.name
 				if name == None:
@@ -190,9 +191,9 @@ class BuypeebApp:
 				treeIter = Gtk.TreeModel.get_iter(self.items, listing.path)
 				if item_list != None:
 					for i in range(0, 4):
-						self.items.set(treeIter, i, item_list[i])
+						self.items.set(treeIter, i, item_list[i] if item_list[0] is not None else "")
 				else:
-					self.items.set(treeIter, 0, item.name)
+					self.items.set(treeIter, 0, item.name if item.name is not None else "")
 					if item.ready:
 						self.items.set(treeIter, 1, item.price_jpy())
 						self.items.set(treeIter, 2, item.price_aud())
@@ -277,10 +278,9 @@ class BuypeebApp:
 
 	def btnSelectedRenameClicked(self, widget):
 		item = self.settings.watchlist[self.selected]
-		name = self.entryBox("Rename", f"Enter a new name for \"{item.name}\".")
-		if name:
+		name = self.entryBox("Rename", f"Enter a new name for \"{item.name}\".", True, item.name)
+		if name and item.name != name:
 			item.name = name
-
 			self.updateListItem(item.id)
 
 	def btnSelectedRemoveClicked(self, widget):