Password generation button with display toggle and indicator is now a user control

SetCredentials user controls now uses PasswordGenerationBox user control
Some layout improvements in EntryDetailsPage
WIP Clipboard suspend issues

WinAppCommon/Messages/PasswordGeneratedMessage.cs

@@ -0,0 +1,7 @@
+namespace Messages
+{
+    public class PasswordGeneratedMessage
+    {
+        public string Password { get; set; }
+    }
+}