fix i18n for context menus

gui/kivy/uix/context_menu.py

@@ -8,6 +8,8 @@ from kivy.lang import Builder
 from kivy.factory import Factory
 from kivy.clock import Clock
 
+from electrum_gui.kivy.i18n import _
+
 Builder.load_string('''
 <MenuItem@Button>
     background_color: .2, .9, 1, 1
@@ -40,7 +42,7 @@ class ContextMenu(Bubble):
         self.obj = obj
         for k, v in action_list:
             l = MenuItem()
-            l.text = k
+            l.text = _(k)
             def func(f=v):
                 Clock.schedule_once(lambda dt: self.hide(), 0.1)
                 Clock.schedule_once(lambda dt: f(obj), 0.15)