RC4: Crash when showing "migrate to auto upload" dialog

[tobiasKaminsky]

java.lang.RuntimeException:
at android.app.ActivityThread.handleBindApplication (ActivityThread.java:4599)
at android.app.ActivityThread.access$1500 (ActivityThread.java:155)
at android.app.ActivityThread$H.handleMessage (ActivityThread.java:1304)
at android.os.Handler.dispatchMessage (Handler.java:102)
at android.os.Looper.loop (Looper.java:136)
at android.app.ActivityThread.main (ActivityThread.java:5433)
at java.lang.reflect.Method.invokeNative (Native Method)
at java.lang.reflect.Method.invoke (Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run (ZygoteInit.java:1268)
at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:1084)
at dalvik.system.NativeStart.main (Native Method)
Caused by: android.view.WindowManager$BadTokenException:
at android.view.ViewRootImpl.setView (ViewRootImpl.java:546)
at android.view.WindowManagerGlobal.addView (WindowManagerGlobal.java:259)
at android.view.WindowManagerImpl.addView (WindowManagerImpl.java:69)
at android.app.Dialog.show (Dialog.java:286)
at android.support.v7.app.AlertDialog$Builder.show (AlertDialog.java:957)
at com.owncloud.android.MainApp.updateToAutoUpload (MainApp.java:341)
at com.owncloud.android.MainApp.onCreate (MainApp.java:127)
at android.app.Instrumentation.callApplicationOnCreate (Instrumentation.java:1014)
at android.app.ActivityThread.handleBindApplication (ActivityThread.java:4596)