AlertBanner positioned correctly in UIScrollView, sync fail alert won't show more often than once within 1 minute timespan, on sync success any sync fail alert will disappear
Merge branch 'kaanjin-iossyncimprovements' of https://github.com/toggl/mobile into kaanjin-iossyncimprovements

Conflicts:
	Ross/ViewControllers/TimerNavigationController.cs
	Ross/Views/AlertBanner.cs