added assert on app wakeup

src/bitmessagekivy/tests/test_setting_screen.py

@@ -8,6 +8,8 @@ class SettingScreen(TeleniumTestProcess):
         """Show Setting Screen"""
         print("=====================Test -Show Setting Screen=====================")
         self.cli.sleep(3)
+        # this is for checking current screen
+        self.assertExists("//Inbox[@name~=\"inbox\"]", timeout=2)
         # this is for opening Nav drawer
         self.cli.wait_click('//MDActionTopAppBarButton[@icon=\"menu\"]', timeout=2)
         # checking state of Nav drawer