[MBraille-Test] Test subscriptions, restore purchase

Hi all, Regarding the subscriptions in the test versions. The subscriptions and restore purchase in Testflight and Google Playstore work against a sandbox, not a real store. For Apple, the subscriptions elapse faster than the wallclock time, both monthly and yearly subscription will expire in 24 hours, if I read the Apple docs correctly. For Google, the time goes faster, one month goes in about 5 minutes and one year in about 30 minutes. Restore purchase did not give any feedback, which was clearly a bug. So one more test version, I reworked the settings a bit to avoid one hop when going to subscription screen from settings. I also made it more explicit what subscription is in effect. So v26.0.7 coming soon. Best regards, Harri