cleaned up code

MacPass/MPDocument.m

@@ -115,7 +115,7 @@ NSString *const MPDocumentGroupKey                            = @"MPDocumentGrou
   return YES;
 }
 
-- (id)init {
+- (instancetype)init {
   self = [super init];
   if(self) {
     _didLockFile = NO;

MacPass/MPDocumentWindowController.m

@@ -306,6 +306,7 @@ typedef void (^MPPasswordChangedBlock)(BOOL didChangePassword);
     self.passwordEditWindowController.delegate = self;
   }
   [self.document addWindowController:self.passwordEditWindowController];
+  
   [NSApp beginSheet:self.passwordEditWindowController.window
      modalForWindow:self.window
       modalDelegate:self

MacPass/MPPasswordEditWindowController.m

@@ -31,7 +31,6 @@
 - (id)initWithWindow:(NSWindow *)window {
   self = [super initWithWindow:window];
   if(self){
-    //_allowsEmptyPasswordOrKey = YES;
     _showPassword = NO;
     _hasValidPasswordOrKey = NO;
   }