use API for refresh when closing widgets in message popups

frontend/ui/widget/notification.lua

@@ -20,6 +20,7 @@ local Notification = InputContainer:new{
     timeout = nil,
     margin = 5,
     padding = 5,
+    closed = false,
 }
 
 function Notification:init()
@@ -55,17 +56,25 @@ function Notification:init()
     }
 end
 
+function Notification:close()
+    if not self.closed then
+        self.closed = true
+        UIManager:close(self, "partial", self[1][1].dimen)
+    end
+end
+
 function Notification:onShow()
     -- triggered by the UIManager after we got successfully shown (not yet painted)
     if self.timeout then
-        UIManager:scheduleIn(self.timeout, function() UIManager:close(self) end)
+        UIManager:scheduleIn(self.timeout, function() self:close() end)
     end
+    self.closed = false
     return true
 end
 
 function Notification:onAnyKeyPressed()
     -- triggered by our defined key events
-    UIManager:close(self)
+    self:close()
     return true
 end