Fix sign-out.

[FIXED]     MP-13: Sign Out doesn't work -- when password is saved,
            signing out signs you right back in.  Now, the saved key
            password is forgotten.

MasterPassword/iOS/MPAppDelegate.m

@@ -114,6 +114,25 @@
     [self.window.rootViewController presentModalViewController:composer animated:YES];
 }
 
+#pragma mark - PearlConfigDelegate
+
+- (void)didUpdateConfigForKey:(SEL)configKey fromValue:(id)value {
+    
+    [self checkConfig];
+}
+
+- (void)checkConfig {
+    
+    if ([[MPConfig get].saveKey boolValue]) {
+        if (self.key)
+            [self updateKey:self.key];
+    } else
+        [self loadStoredKey];
+    
+    if ([[MPConfig get].iCloud boolValue] != [self.storeManager iCloudEnabled])
+        [self.storeManager useiCloudStore:[[MPConfig get].iCloud boolValue] alertUser:YES];
+}
+
 #pragma mark - UIApplicationDelegate
 
 
@@ -367,18 +386,6 @@
     [TestFlight passCheckpoint:MPTestFlightCheckpointDeactivated];
 }
 
-- (void)checkConfig {
-    
-    if ([[MPConfig get].saveKey boolValue]) {
-        if (self.key)
-            [self updateKey:self.key];
-    } else
-        [self loadStoredKey];
-    
-    if ([[MPConfig get].iCloud boolValue] != [self.storeManager iCloudEnabled])
-        [self.storeManager useiCloudStore:[[MPConfig get].iCloud boolValue] alertUser:YES];
-}
-
 #pragma mark - MFMailComposeViewControllerDelegate
 
 - (void)mailComposeController:(MFMailComposeViewController *)controller

MasterPassword/iOS/MPMainViewController.m

@@ -434,6 +434,7 @@
 #endif
 #endif
                          {
+                             [MPConfig get].saveKey = [NSNumber numberWithBool:NO];
                              [[MPAppDelegate get] signOut:self];
                              [[MPAppDelegate get] loadKey:YES];
                              break;