Remove dialog & add import/export

[REMOVED]   Mac password Dialog.
[ADDED]     Mac sites import / export.
[FIXED]     Copying of hidden passwords.

MasterPassword/ObjC/MPAppDelegate_Store.h

@@ -11,13 +11,13 @@
 #import "UbiquityStoreManager.h"
 #import "MPFixable.h"
 
-typedef enum {
+typedef NS_ENUM( NSUInteger, MPImportResult ) {
     MPImportResultSuccess,
     MPImportResultCancelled,
     MPImportResultInvalidPassword,
     MPImportResultMalformedInput,
     MPImportResultInternalError,
-} MPImportResult;
+};
 
 @interface MPAppDelegate_Shared(Store)<UbiquityStoreManagerDelegate>