“Welcome to element” is displayed if an initial sync failed

[manuroe]

When MXSession goes to MXSessionStateInitialSyncFailed, the app opens in an empty state:

2021-07-31 17:08:35.131 Riot[549:72315]  [MXSession] setState: 10 (was 3)
2021-07-31 17:08:35.131 Riot[549:72315]  [AppDelegate] handleAppState: isLaunching: NO
2021-07-31 17:08:35.132 Riot[549:72315]  [MXBaseProfiler] Task startup - launchScreen for 1 units completed in 104348.000ms
2021-07-31 17:08:35.133 Riot[549:72315]  [AppDelegate] hideLaunchAnimation: LaunchAnimation was shown for 104348.000ms