Fix migration problems non-interactively.

[FIXED]     Migration problems should be fixed non-interactively: The
            main thread may well be unavailable which means we may not
            be able to actually get a message through to the user.  This
            would dead-lock the migration problem recovery.

External/iCloudStoreManager

@@ -1 +1 @@
-Subproject commit b456a34975e65fba8e2228b790706d852188ecb2
+Subproject commit 71cfb8f4e21a536f5d88a69401f02eeaf1c0a89f

MasterPassword/MPAppDelegate_Store.m

@@ -181,11 +181,6 @@ static NSDateFormatter *rfc3339DateFormatter = nil;
     dbg(@"StoreManager: %@", message);
 }
 
-- (void)ubiquityStoreManager:(UbiquityStoreManager *)manager didEncounterError:(NSError *)error cause:(UbiquityStoreManagerErrorCause)cause context:(id)context {
-    
-    err(@"StoreManager: cause=%d, context=%@, error=%@", cause, context, error);
-}
-
 #pragma mark - Import / Export
 
 - (void)loadRFC3339DateFormatter {

MasterPassword/iOS/MPAppDelegate.m

@@ -396,30 +396,32 @@
 
 #pragma mark - UbiquityStoreManagerDelegate
 
+- (void)ubiquityStoreManager:(UbiquityStoreManager *)manager didSwitchToiCloud:(BOOL)didSwitch {
+    
+    inf(@"didSwitchToiCloud: %d", didSwitch);
+}
+
 - (void)ubiquityStoreManager:(UbiquityStoreManager *)manager didEncounterError:(NSError *)error cause:(UbiquityStoreManagerErrorCause)cause context:(id)context {
     
     err(@"StoreManager: cause=%d, context=%@, error=%@", cause, context, error);
     
     switch (cause) {
         case UbiquityStoreManagerErrorCauseDeleteStore:
+        case UbiquityStoreManagerErrorCauseDeleteLogs:
         case UbiquityStoreManagerErrorCauseCreateStorePath:
         case UbiquityStoreManagerErrorCauseClearStore:
             break;
         case UbiquityStoreManagerErrorCauseOpenLocalStore: {
-            [PearlAlert showError:@"Could not open your local database.\n\n"
+            wrn(@"Local store could not be opened, resetting it.");
-             @"The database may be too old.  It will be deleted, the application will quit, "
+            manager.hardResetEnabled = YES;
-             @"and on the next launch a fresh database will be created." tappedButtonBlock:^(UIAlertView *alert, NSInteger buttonIndex) {
+            [manager hardResetLocalStorage];
-                 wrn(@"Local store could not be opened, deleting it.");
+            exit(1);
-                 [[NSFileManager defaultManager] removeItemAtURL:context error:nil];
-                 exit(0);
-             } otherTitles:nil];
             break;
         }
         case UbiquityStoreManagerErrorCauseOpenCloudStore: {
-            [PearlAlert showError:@"Could not use iCloud-synced storage.  Will use a local database for now.\n\n"
+            wrn(@"iCloud store could not be opened, resetting it.");
-             @"If this problem persists, you may need to reset your Master Password database on iCloud."];
+            manager.hardResetEnabled = YES;
-            wrn(@"iCloud store could not be opened, moving to local store.");
+            [manager hardResetCloudStorage];
-            [manager useiCloudStore:NO alertUser:NO];
             break;
         }
     }