reposition buttons in Log In and Unlock pages (#1073)

* reposition buttons in Log In and Unlock pages

-   Log In page: move Log In button to primary location below password
    entry, move Get Your Master Password Hint to the More Options menu
-   Unlock page (Verify Master Password): swap position of Unlock
    and Log Out buttons

* finish changes to improved login ui

- move Log Out button in lock screen to secondary menu
- show Get Hint button on login screen in the iOS autofill login flow

Co-authored-by: Matt Portune <59324545+mportune-bw@users.noreply.github.com>

src/App/Pages/Accounts/LoginPageViewModel.cs

@@ -25,7 +25,6 @@ namespace Bit.App.Pages
         private bool _showPassword;
         private string _email;
         private string _masterPassword;
-        private bool _hideHintButton;
 
         public LoginPageViewModel()
         {
@@ -70,13 +69,7 @@ namespace Bit.App.Pages
         public Action StartTwoFactorAction { get; set; }
         public Action LogInSuccessAction { get; set; }
         public Action CloseAction { get; set; }
-
-        public bool HideHintButton
-        {
-            get => _hideHintButton;
-            set => SetProperty(ref _hideHintButton, value);
-        }
-        
+                
         public async Task InitAsync()
         {
             if (string.IsNullOrWhiteSpace(Email))