Add confirmation dialogs

Views/ManageUsersDisplay.cs

@@ -108,6 +108,11 @@ namespace Akari.Provider.WaveshareUART.Views
         {
             var marked = UsersManager.Users.Where((_, index) => _listView.Source.IsMarked(index)).ToHashSet();
 
+            if (MessageBox.Query("Delete Users", $"Do you really want to delete the {marked.Count} selected users?", "Yes", "No") != 0)
+            {
+                return;
+            }
+
             if (UsersManager.Remove(marked))
             {
                 MessageBox.Query("Delete Users", $"Successfully deleted {marked.Count} user{(marked.Count > 1 ? "s" : "")}", "Ok");
@@ -122,6 +127,11 @@ namespace Akari.Provider.WaveshareUART.Views
 
         private void DeleteAllButton_Clicked()
         {
+            if (MessageBox.Query("Delete Users", "Do you really want to delete all the users?", "yes", "No") != 0)
+            {
+                return;
+            }
+
             if (UsersManager.Clear())
             {
                 MessageBox.Query("Delete Users", $"Successfully deleted all users", "Ok");