Fixed some minor crash cases.

[FIXED]     Crash when changing iCloud store.
[FIXED]     Use main thread when holding down on a user.

External/Pearl

@@ -1 +1 @@
-Subproject commit fa4f22d4386d6ffec169b620c722cc7c89aa1715
+Subproject commit ed17f53324c5537d70cb08e25b07eb4def2eb9c5

External/UbiquityStoreManager

@@ -1 +1 @@
-Subproject commit 59a0c1e8452ba1094fafdd1d8804a1edfe93347c
+Subproject commit 4d23a792070c0895c7b2ab0e7ab6a74d4c3a2078

MasterPassword/ObjC/iOS/MPLogsViewController.h

@@ -22,6 +22,7 @@
 @interface MPLogsViewController : UIViewController
 @property (weak, nonatomic) IBOutlet UITextView *logView;
 @property (weak, nonatomic) IBOutlet UISegmentedControl *levelControl;
+@property(nonatomic, strong) PearlAlert *switchCloudStoreProgress;
 - (IBAction)action:(id)sender;
 - (IBAction)toggleLevelControl:(UISegmentedControl *)sender;
 - (IBAction)refresh:(UIBarButtonItem *)sender;

MasterPassword/ObjC/iOS/MPLogsViewController.m

@@ -21,7 +21,11 @@
 #import "MPAppDelegate_Store.h"
 #import "MPAppDelegate_Key.h"
 
-@implementation MPLogsViewController
+@implementation MPLogsViewController {
+    PearlAlert *switchCloudStoreProgress;
+}
+
+@synthesize switchCloudStoreProgress;
 
 - (void)viewDidLoad {
 
@@ -58,7 +62,10 @@
                              if (buttonIndex_ == alert.cancelButtonIndex)
                                  return;
 
+                             switchCloudStoreProgress = [PearlAlert showActivityWithTitle:@"Enumerating Stores"];
+                             dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_BACKGROUND, 0), ^{
                                  [self switchCloudStore];
+                             });
                          }     cancelTitle:[PearlStrings get].commonButtonCancel otherTitles:[PearlStrings get].commonButtonContinue, nil];
         }
     }                  cancelTitle:[PearlStrings get].commonButtonCancel
@@ -80,7 +87,11 @@
         if ([[NSFileManager defaultManager] fileExistsAtPath:content.path isDirectory:&directory] && directory)
             [contentNames addObject:[content lastPathComponent]];
 
-    [PearlSheet showSheetWithTitle:[[MPiOSAppDelegate get].storeManager valueForKey:@"storeUUID_ThreadSafe"]
+    NSString *storeUUID = [[MPiOSAppDelegate get].storeManager valueForKey:@"storeUUID_ThreadSafe"];
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [switchCloudStoreProgress cancelAlertAnimated:YES];
+
+        [PearlSheet showSheetWithTitle:storeUUID
                              viewStyle:UIActionSheetStyleAutomatic
                              initSheet:^(UIActionSheet *sheet) {
                                  for (NSString *contentName in contentNames) {
@@ -96,6 +107,7 @@
                          [[MPiOSAppDelegate get] signOutAnimated:YES];
                      }
                            cancelTitle:[PearlStrings get].commonButtonCancel destructiveTitle:nil otherTitles:nil];
+    });
 }
 
 - (IBAction)toggleLevelControl:(UISegmentedControl *)sender {

MasterPassword/ObjC/iOS/MPUnlockViewController.m

@@ -1006,7 +1006,7 @@
     if ([self selectedUserForThread])
         return;
 
-    [MPiOSAppDelegate managedObjectContextPerformBlock:^(NSManagedObjectContext *context) {
+    NSManagedObjectContext *context = [MPiOSAppDelegate managedObjectContextForMainThreadIfReady];
     MPUserEntity *targetedUser = [self userForAvatar:[self findTargetedAvatar] inContext:context];
     if (!targetedUser)
         return;
@@ -1018,14 +1018,12 @@
             return;
 
         if (buttonIndex == [sheet destructiveButtonIndex]) {
-                [context performBlock:^{
             [context deleteObject:targetedUser];
             [context saveToStore];
 
             dispatch_async( dispatch_get_main_queue(), ^{
                 [self updateUsers];
             } );
-                }];
             return;
         }
 
@@ -1037,7 +1035,6 @@
             }];
     }                  cancelTitle:[PearlStrings get].commonButtonCancel
                   destructiveTitle:@"Delete User" otherTitles:@"Reset Password", nil];
-    }];
 }
 
 - (IBAction)facebook:(UIButton *)sender {