fix: don't reverse commit order when cherry-picking (#736)

Fixes #726.  Looks like a980cc9 isn't sufficient.  It sorts the commits according to the ordering in history,  but then CherryPick ViewModel reverses the order.

This commit changes CherryPick ViewModel to use string.Join on the commit list without reordering,  so that the ordering is controlled entirely by the caller.

Author: czarkoff

src/ViewModels/CherryPick.cs

@@ -85,13 +85,9 @@ public override Task<bool> Sure()
                 }
                 else
                 {
-                    var builder = new StringBuilder();
-                    for (int i = Targets.Count - 1; i >= 0; i--)
-                        builder.Append($"{Targets[i].SHA} ");
-
                     succ = new Commands.CherryPick(
                         _repo.FullPath,
-                        builder.ToString(),
+                        string.Join(' ', Targets.ConvertAll(c => c.SHA)),
                         !AutoCommit,
                         AppendSourceToMessage,
                         string.Empty).Exec();