Currently, when a ProgressBar is introduced into a Page, it contains an 'Orientation' Property that can used to change its orientation between Horizontal and Vertical.
This works out-of-the-box.

However, when a default Template is created for the ProgressBar, this functionality no longer exists.

See attached video.

Repro Steps:

1) Create a Studio Project featuring a MainPage.xaml

2) Introduce a ProgressBar Element into the RootGrid, select it, give it a custom dimension, and a 'Value' number to be able to see the fill of the ProgressBar on-Stage.

3) Adjust the ProgressBar's 'Orientation' Property from the default 'Horizontal' to 'Vertical'.

Observe how the ProgressBar Element changes its orientation successfully, with all functionality conserved.

4) With the ProgressBar's 'Orientation' still set as 'Vertical', right-click on the ProgressBar on-Stage, and from from its 'Templates' context menu section, select 'Create', and give it a name and a save location.
This will open the ProgressBar Template in the Template Dummy Editor.

Observe how the ProgressBar has reverted to a Horizontal orientation.

5) Exit the Template Dummy Editor, and select the ProgressBar on-Stage.

6) From its Properties Panel, toggle its Orientation Property between 'Horizontal' and 'Vertical'.

Observe how the functionality to change its Orientation has been broken.

Expected Results: Creating a Default Template for the ProgressBar Template does not wipe its default functionality