code_review: PR #644

- use `AutoFocusBehaviour.IsEnable` instead of toggle focus by code in `OnOpened `

Signed-off-by: leo <longshuang@msn.cn>

src/Views/Askpass.axaml.cs

@@ -52,11 +52,5 @@ namespace SourceGit.Views
             Console.Out.Write($"{Passphrase}\n");
             App.Quit(0);
         }
-
-        protected override void OnOpened(EventArgs e)
-        {
-            PassphraseTextBox.Focus();
-            base.OnOpened(e);
-        }
     }
 }