Migration cleanup and improvements.

[IMPROVED]  Migration code cleanup.
[FIXED]     When local store migration fails, fall back to opening the old local store if possible.
[FIXED]     Better migration of cloud preferences.
[FIXED]     Better checking of when to perform cloud store migration.
[FIXED]     Always migrate the local store, even when the cloud store is enabled.
[UPDATED]   Removed the loading indicator in favor of a loading overlay.
[UPDATED]   Sorted the file references lexicographically.

MasterPassword/ObjC/iOS/MasterPassword-iOS.xcodeproj/xcshareddata/xcschemes/MasterPassword iOS (Development).xcscheme

@@ -1,10 +1,16 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
    version = "1.3">
-   <BuildAction>
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES">
       <BuildActionEntries>
          <BuildActionEntry
-            buildForRunning = "YES">
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
             <BuildableReference
                BuildableIdentifier = "primary"
                BlueprintIdentifier = "DA5BFA43147E415C00F98B1E"
@@ -15,9 +21,32 @@
          </BuildActionEntry>
       </BuildActionEntries>
    </BuildAction>
-   <LaunchAction
-      useCustomWorkingDirectory = "NO"
+   <TestAction
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "YES"
       buildConfiguration = "Debug">
+      <Testables>
+      </Testables>
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "DA5BFA43147E415C00F98B1E"
+            BuildableName = "MasterPassword.app"
+            BlueprintName = "MasterPassword"
+            ReferencedContainer = "container:MasterPassword-iOS.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+   </TestAction>
+   <LaunchAction
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      buildConfiguration = "Debug"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      allowLocationSimulation = "YES">
       <BuildableProductRunnable>
          <BuildableReference
             BuildableIdentifier = "primary"
@@ -27,5 +56,30 @@
             ReferencedContainer = "container:MasterPassword-iOS.xcodeproj">
          </BuildableReference>
       </BuildableProductRunnable>
+      <AdditionalOptions>
+      </AdditionalOptions>
    </LaunchAction>
+   <ProfileAction
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      buildConfiguration = "Debug"
+      debugDocumentVersioning = "YES">
+      <BuildableProductRunnable>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "DA5BFA43147E415C00F98B1E"
+            BuildableName = "MasterPassword.app"
+            BlueprintName = "MasterPassword"
+            ReferencedContainer = "container:MasterPassword-iOS.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
 </Scheme>