kivy: updates

plugins/exchange_rate/exchange_rate.py

@@ -309,6 +309,7 @@ class FxPlugin(BasePlugin, ThreadJob):
     def on_history(self):
         pass
 
+    @hook
     def exchange_rate(self):
         '''Returns None, or the exchange rate as a Decimal'''
         rate = self.exchange.quotes.get(self.ccy)

plugins/exchange_rate/kivy.py

@@ -9,3 +9,7 @@ class Plugin(FxPlugin):
     def on_quotes(self):
         self.print_error("on quotes", self.ccy)
         self.window.fiat_unit = self.ccy
+
+    def on_history(self):
+        self.print_error("on history")
+        self.window.history_screen.update()