Description of the new feature/enhancement

We need to add automation properties throughout the settings UI. Here are a few examples that really need to be addressed:

• Profile > Appearance > background image alignment control
• color schemes > buttons
• Startup > default profile > combo box items
• (unverified) Profile/ColorSchemes > Delete button (and any other buttons with icons)

Proposed technical implementation details (optional)

The general approach to adding automation properties is to add something like this to the resw file:

<data name="Profile_BackgroundImageAlignmentBottom.[using:Windows.UI.Xaml.Automation]AutomationProperties.Name" xml:space="preserve">
	<value>Align to Bottom</value>
</data>

However, this causes some localization burden, and since the help text will most likely match the tooltip, it would be more ideal if we could reuse the same resw entry. This would ensure that they're always in sync.

I think CommandPalette had to do something similar to this.