[SettingsControls] Bugfix for wrapping states

[niels9001]

Addressing: #219

Before, when resizing a card where the Content is not set or Content is set but no Header + Description the spacing would be applied, resulting in #219.

Before:

After:

To test:

• Add the following XAML to a sample and resize the window:

 <controls:SettingsCard >
     <ComboBox SelectedIndex="0">
         <ComboBoxItem>Option 1</ComboBoxItem>
         <ComboBoxItem>Option 2</ComboBoxItem>
         <ComboBoxItem>Option 3</ComboBoxItem>
     </ComboBox>
 </controls:SettingsCard>

[niels9001]

FYI @0x5bfa

[0x5bfa]

Thank you for fixing instead of me!

[Arlodotexe]

Tested locally, think we're seeing a bit too much extra space now?

[niels9001]

@Arlodotexe Fixed the issue where whenever a custom SettingsCardWrapThreshold would be set and the control size would be lower than that, that the spacing would not be added. On load we're checking the state now and make sure the spacing is added.

Should be all good now!

[Arlodotexe]

Checked on Uwp and Wasm. Looks much better, good to go!

[michael-hawker]

Going to close and re-open to rekick CI