Unable to remove Sync on Android device

[srirambv]

STR

1. Clean install 1.4.3(beta) build
2. Enable Sync on the device
3. Create Sync chain group
4. Remove my device -> Ok to confirm
5. Shows Delete request has been sent. Device will be removed shortly
6. Error out saying Time is out and doesn't remove the device
7. Remove my device button is not shown, navigating back to sync menu and back shows the Remove my device button again
   

[samartnik]

I suppose it was related to internet problems. Request wasn't sent and therefore we couldn't receive response. Changed the message here and added ability to repeat attempt without re-entering sync menu. Changes are here samartnik/browser-android-tabs@9fb383d